]> git.wh0rd.org - tt-rss.git/blobdiff - classes/pref/feeds.php
Merge branch 'master' of git.tt-rss.org:git/tt-rss into pdo-experimental
[tt-rss.git] / classes / pref / feeds.php
index 2a9c57e790345ca2a6cc283c165a9b08861a27f1..846e814ee494ae18d4addd6fa7a2ba7dbb233a5d 100644 (file)
@@ -17,35 +17,34 @@ class Pref_Feeds extends Handler_Protected {
        }
 
        function renamecat() {
-               $title = $this->dbh->escape_string($_REQUEST['title']);
-               $id = $this->dbh->escape_string($_REQUEST['id']);
+               $title = clean($_REQUEST['title']);
+               $id = clean($_REQUEST['id']);
 
                if ($title) {
-                       $this->dbh->query("UPDATE ttrss_feed_categories SET
-                               title = '$title' WHERE id = '$id' AND owner_uid = " . $_SESSION["uid"]);
+                       $sth = $this->pdo->prepare("UPDATE ttrss_feed_categories SET
+                               title = ? WHERE id = ? AND owner_uid = ?");
+                       $sth->execute([$title, $id, $_SESSION['uid']]);
                }
-               return;
        }
 
        private function get_category_items($cat_id) {
 
-               if ($_REQUEST['mode'] != 2)
+               if (clean($_REQUEST['mode']) != 2)
                        $search = $_SESSION["prefs_feed_search"];
                else
                        $search = "";
 
-               if ($search) $search_qpart = " AND (LOWER(title) LIKE LOWER('%$search%') OR LOWER(feed_url) LIKE LOWER('%$search%'))";
-
                // first one is set by API
-               $show_empty_cats = $_REQUEST['force_show_empty'] ||
-                       ($_REQUEST['mode'] != 2 && !$search);
+               $show_empty_cats = clean($_REQUEST['force_show_empty']) ||
+                       (clean($_REQUEST['mode']) != 2 && !$search);
 
                $items = array();
 
-               $result = $this->dbh->query("SELECT id, title FROM ttrss_feed_categories
-                               WHERE owner_uid = " . $_SESSION["uid"] . " AND parent_cat = '$cat_id' ORDER BY order_id, title");
+               $sth = $this->pdo->prepare("SELECT id, title FROM ttrss_feed_categories
+                               WHERE owner_uid = ? AND parent_cat = ? ORDER BY order_id, title");
+               $sth->execute([$_SESSION['uid'], $cat_id]);
 
-               while ($line = $this->dbh->fetch_assoc($result)) {
+               while ($line = $sth->fetch()) {
 
                        $cat = array();
                        $cat['id'] = 'CAT:' . $line['id'];
@@ -69,13 +68,17 @@ class Pref_Feeds extends Handler_Protected {
 
                }
 
-               $feed_result = $this->dbh->query("SELECT id, title, last_error,
+               $fsth = $this->pdo->prepare("SELECT id, title, last_error,
                        ".SUBSTRING_FOR_DATE."(last_updated,1,19) AS last_updated
                        FROM ttrss_feeds
-                       WHERE cat_id = '$cat_id' AND owner_uid = ".$_SESSION["uid"].
-                       "$search_qpart ORDER BY order_id, title");
+                       WHERE cat_id = :cat AND 
+                       owner_uid = :uid AND
+                       (:search = '' OR (LOWER(title) LIKE :search OR LOWER(feed_url) LIKE :search))
+                       ORDER BY order_id, title");
 
-               while ($feed_line = $this->dbh->fetch_assoc($feed_result)) {
+               $fsth->execute([":cat" => $cat_id, ":uid" => $_SESSION['uid'], ":search" => $search ? "%$search%" : ""]);
+
+               while ($feed_line = $fsth->fetch()) {
                        $feed = array();
                        $feed['id'] = 'FEED:' . $feed_line['id'];
                        $feed['bare_id'] = (int)$feed_line['id'];
@@ -100,13 +103,11 @@ class Pref_Feeds extends Handler_Protected {
 
        function makefeedtree() {
 
-               if ($_REQUEST['mode'] != 2)
+               if (clean($_REQUEST['mode']) != 2)
                        $search = $_SESSION["prefs_feed_search"];
                else
                        $search = "";
 
-               if ($search) $search_qpart = " AND LOWER(title) LIKE LOWER('%$search%')";
-
                $root = array();
                $root['id'] = 'root';
                $root['name'] = __('Feeds');
@@ -115,7 +116,7 @@ class Pref_Feeds extends Handler_Protected {
 
                $enable_cats = get_pref('ENABLE_FEED_CATS');
 
-               if ($_REQUEST['mode'] == 2) {
+               if (clean($_REQUEST['mode']) == 2) {
 
                        if ($enable_cats) {
                                $cat = $this->feedlist_init_cat(-1);
@@ -158,29 +159,31 @@ class Pref_Feeds extends Handler_Protected {
                                $root['items'] = array_merge($root['items'], $cat['items']);
                        }
 
-                       $result = $this->dbh->query("SELECT * FROM
-                               ttrss_labels2 WHERE owner_uid = ".$_SESSION['uid']." ORDER by caption");
+                       $sth = $this->pdo->prepare("SELECT * FROM
+                               ttrss_labels2 WHERE owner_uid = ? ORDER by caption");
+                       $sth->execute([$_SESSION['uid']]);
 
-                       if ($this->dbh->num_rows($result) > 0) {
-
-                               if (get_pref('ENABLE_FEED_CATS')) {
-                                       $cat = $this->feedlist_init_cat(-2);
-                               } else {
-                                       $cat['items'] = array();
-                               }
+                       if (get_pref('ENABLE_FEED_CATS')) {
+                               $cat = $this->feedlist_init_cat(-2);
+                       } else {
+                               $cat['items'] = array();
+                       }
 
-                               while ($line = $this->dbh->fetch_assoc($result)) {
+                       $num_labels = 0;
+                       while ($line = $sth->fetch()) {
+                               ++$num_labels;
 
-                                       $label_id = Labels::label_to_feed_id($line['id']);
+                               $label_id = Labels::label_to_feed_id($line['id']);
 
-                                       $feed = $this->feedlist_init_feed($label_id, false, 0);
+                               $feed = $this->feedlist_init_feed($label_id, false, 0);
 
-                                       $feed['fg_color'] = $line['fg_color'];
-                                       $feed['bg_color'] = $line['bg_color'];
+                               $feed['fg_color'] = $line['fg_color'];
+                               $feed['bg_color'] = $line['bg_color'];
 
-                                       array_push($cat['items'], $feed);
-                               }
+                               array_push($cat['items'], $feed);
+                       }
 
+                       if ($num_labels) {
                                if ($enable_cats) {
                                        array_push($root['items'], $cat);
                                } else {
@@ -190,13 +193,14 @@ class Pref_Feeds extends Handler_Protected {
                }
 
                if ($enable_cats) {
-                       $show_empty_cats = $_REQUEST['force_show_empty'] ||
-                               ($_REQUEST['mode'] != 2 && !$search);
+                       $show_empty_cats = clean($_REQUEST['force_show_empty']) ||
+                               (clean($_REQUEST['mode']) != 2 && !$search);
 
-                       $result = $this->dbh->query("SELECT id, title FROM ttrss_feed_categories
-                               WHERE owner_uid = " . $_SESSION["uid"] . " AND parent_cat IS NULL ORDER BY order_id, title");
+                       $sth = $this->pdo->prepare("SELECT id, title FROM ttrss_feed_categories
+                               WHERE owner_uid = ? AND parent_cat IS NULL ORDER BY order_id, title");
+                       $sth->execute([$_SESSION['uid']]);
 
-                       while ($line = $this->dbh->fetch_assoc($result)) {
+                       while ($line = $sth->fetch()) {
                                $cat = array();
                                $cat['id'] = 'CAT:' . $line['id'];
                                $cat['bare_id'] = (int)$line['id'];
@@ -232,13 +236,16 @@ class Pref_Feeds extends Handler_Protected {
                        $cat['unread'] = 0;
                        $cat['child_unread'] = 0;
 
-                       $feed_result = $this->dbh->query("SELECT id, title,last_error,
+                       $fsth = $this->pdo->prepare("SELECT id, title,last_error,
                                ".SUBSTRING_FOR_DATE."(last_updated,1,19) AS last_updated
                                FROM ttrss_feeds
-                               WHERE cat_id IS NULL AND owner_uid = ".$_SESSION["uid"].
-                               "$search_qpart ORDER BY order_id, title");
+                               WHERE cat_id IS NULL AND 
+                               owner_uid = :uid AND
+                               (:search = '' OR (LOWER(title) LIKE :search OR LOWER(feed_url) LIKE :search))
+                               ORDER BY order_id, title");
+                       $fsth->execute([":uid" => $_SESSION['uid'], ":search" => $search ? "%$search%" : ""]);
 
-                       while ($feed_line = $this->dbh->fetch_assoc($feed_result)) {
+                       while ($feed_line = $fsth->fetch()) {
                                $feed = array();
                                $feed['id'] = 'FEED:' . $feed_line['id'];
                                $feed['bare_id'] = (int)$feed_line['id'];
@@ -264,13 +271,15 @@ class Pref_Feeds extends Handler_Protected {
                        $root['param'] = vsprintf(_ngettext('(%d feed)', '(%d feeds)', (int) $num_children), $num_children);
 
                } else {
-                       $feed_result = $this->dbh->query("SELECT id, title, last_error,
+                       $fsth = $this->pdo->prepare("SELECT id, title, last_error,
                                ".SUBSTRING_FOR_DATE."(last_updated,1,19) AS last_updated
                                FROM ttrss_feeds
-                               WHERE owner_uid = ".$_SESSION["uid"].
-                               "$search_qpart ORDER BY order_id, title");
+                               WHERE owner_uid = :uid AND
+                               (:search = '' OR (LOWER(title) LIKE :search OR LOWER(feed_url) LIKE :search))
+                               ORDER BY order_id, title");
+                       $fsth->execute([":uid" => $_SESSION['uid'], ":search" => $search ? "%$search%" : ""]);
 
-                       while ($feed_line = $this->dbh->fetch_assoc($feed_result)) {
+                       while ($feed_line = $fsth->fetch()) {
                                $feed = array();
                                $feed['id'] = 'FEED:' . $feed_line['id'];
                                $feed['bare_id'] = (int)$feed_line['id'];
@@ -294,7 +303,7 @@ class Pref_Feeds extends Handler_Protected {
                $fl['identifier'] = 'id';
                $fl['label'] = 'name';
 
-               if ($_REQUEST['mode'] != 2) {
+               if (clean($_REQUEST['mode']) != 2) {
                        $fl['items'] = array($root);
                } else {
                        $fl['items'] = $root['items'];
@@ -304,15 +313,15 @@ class Pref_Feeds extends Handler_Protected {
        }
 
        function catsortreset() {
-               $this->dbh->query("UPDATE ttrss_feed_categories
-                               SET order_id = 0 WHERE owner_uid = " . $_SESSION["uid"]);
-               return;
+               $sth = $this->pdo->prepare("UPDATE ttrss_feed_categories
+                               SET order_id = 0 WHERE owner_uid = ?");
+               $sth->execute([$_SESSION['uid']]);
        }
 
        function feedsortreset() {
-               $this->dbh->query("UPDATE ttrss_feeds
-                               SET order_id = 0 WHERE owner_uid = " . $_SESSION["uid"]);
-               return;
+               $sth = $this->pdo->prepare("UPDATE ttrss_feeds
+                               SET order_id = 0 WHERE owner_uid = ?");
+               $sth->execute([$_SESSION['uid']]);
        }
 
        private function process_category_order(&$data_map, $item_id, $parent_id = false, $nest_level = 0) {
@@ -324,19 +333,20 @@ class Pref_Feeds extends Handler_Protected {
 
                if ($debug) _debug("$prefix C: $item_id P: $parent_id");
 
-               $bare_item_id = $this->dbh->escape_string(substr($item_id, strpos($item_id, ':')+1));
+               $bare_item_id = substr($item_id, strpos($item_id, ':')+1);
 
                if ($item_id != 'root') {
                        if ($parent_id && $parent_id != 'root') {
                                $parent_bare_id = substr($parent_id, strpos($parent_id, ':')+1);
-                               $parent_qpart = $this->dbh->escape_string($parent_bare_id);
+                               $parent_qpart = $parent_bare_id;
                        } else {
-                               $parent_qpart = 'NULL';
+                               $parent_qpart = null;
                        }
 
-                       $this->dbh->query("UPDATE ttrss_feed_categories
-                               SET parent_cat = $parent_qpart WHERE id = '$bare_item_id' AND
-                               owner_uid = " . $_SESSION["uid"]);
+                       $sth = $this->pdo->prepare("UPDATE ttrss_feed_categories
+                               SET parent_cat = ? WHERE id = ? AND
+                               owner_uid = ?");
+                       $sth->execute([$parent_qpart, $bare_item_id, $_SESSION['uid']]);
                }
 
                $order_id = 1;
@@ -346,7 +356,7 @@ class Pref_Feeds extends Handler_Protected {
                if ($cat && is_array($cat)) {
                        foreach ($cat as $item) {
                                $id = $item['_reference'];
-                               $bare_id = $this->dbh->escape_string(substr($id, strpos($id, ':')+1));
+                               $bare_id = substr($id, strpos($id, ':')+1);
 
                                if ($debug) _debug("$prefix [$order_id] $id/$bare_id");
 
@@ -354,30 +364,22 @@ class Pref_Feeds extends Handler_Protected {
 
                                        if (strpos($id, "FEED") === 0) {
 
-                                               $cat_id = ($item_id != "root") ?
-                                                       $this->dbh->escape_string($bare_item_id) : "NULL";
+                                               $cat_id = ($item_id != "root") ? $bare_item_id : null;
 
-                                               $cat_qpart = ($cat_id != 0) ? "cat_id = '$cat_id'" :
-                                                       "cat_id = NULL";
+                                               $sth = $this->pdo->prepare("UPDATE ttrss_feeds
+                                                       SET order_id = ?, cat_id = ?
+                                                       WHERE id = ? AND owner_uid = ?");
 
-                                               $this->dbh->query("UPDATE ttrss_feeds
-                                                       SET order_id = $order_id, $cat_qpart
-                                                       WHERE id = '$bare_id' AND
-                                                               owner_uid = " . $_SESSION["uid"]);
+                                               $sth->execute([$order_id, $cat_id ? $cat_id : null, $bare_id, $_SESSION['uid']]);
 
                                        } else if (strpos($id, "CAT:") === 0) {
                                                $this->process_category_order($data_map, $item['_reference'], $item_id,
                                                        $nest_level+1);
 
-                                               if ($item_id != 'root') {
-                                                       $parent_qpart = $this->dbh->escape_string($bare_id);
-                                               } else {
-                                                       $parent_qpart = 'NULL';
-                                               }
-
-                                               $this->dbh->query("UPDATE ttrss_feed_categories
-                                                               SET order_id = '$order_id' WHERE id = '$bare_id' AND
-                                                               owner_uid = " . $_SESSION["uid"]);
+                                               $sth = $this->pdo->prepare("UPDATE ttrss_feed_categories
+                                                               SET order_id = ? WHERE id = ? AND
+                                                               owner_uid = ?");
+                                               $sth->execute([$order_id, $bare_id, $_SESSION['uid']]);
                                        }
                                }
 
@@ -387,9 +389,9 @@ class Pref_Feeds extends Handler_Protected {
        }
 
        function savefeedorder() {
-               $data = json_decode($_POST['payload'], true);
+               $data = json_decode(clean($_POST['payload']), true);
 
-               #file_put_contents("/tmp/saveorder.json", $_POST['payload']);
+               #file_put_contents("/tmp/saveorder.json", clean($_POST['payload']));
                #$data = json_decode(file_get_contents("/tmp/saveorder.json"), true);
 
                if (!is_array($data['items']))
@@ -419,67 +421,28 @@ class Pref_Feeds extends Handler_Protected {
                        }
 
                        $this->process_category_order($data_map, $root_item);
-
-                       /* foreach ($data['items'][0]['items'] as $item) {
-                               $id = $item['_reference'];
-                               $bare_id = substr($id, strpos($id, ':')+1);
-
-                               ++$cat_order_id;
-
-                               if ($bare_id > 0) {
-                                       $this->dbh->query("UPDATE ttrss_feed_categories
-                                               SET order_id = '$cat_order_id' WHERE id = '$bare_id' AND
-                                               owner_uid = " . $_SESSION["uid"]);
-                               }
-
-                               $feed_order_id = 0;
-
-                               if (is_array($data_map[$id])) {
-                                       foreach ($data_map[$id] as $feed) {
-                                               $id = $feed['_reference'];
-                                               $feed_id = substr($id, strpos($id, ':')+1);
-
-                                               if ($bare_id != 0)
-                                                       $cat_query = "cat_id = '$bare_id'";
-                                               else
-                                                       $cat_query = "cat_id = NULL";
-
-                                               $this->dbh->query("UPDATE ttrss_feeds
-                                                       SET order_id = '$feed_order_id',
-                                                       $cat_query
-                                                       WHERE id = '$feed_id' AND
-                                                               owner_uid = " . $_SESSION["uid"]);
-
-                                               ++$feed_order_id;
-                                       }
-                               }
-                       } */
                }
-
-               return;
        }
 
        function removeicon() {
-               $feed_id = $this->dbh->escape_string($_REQUEST["feed_id"]);
+               $feed_id = clean($_REQUEST["feed_id"]);
 
-               $result = $this->dbh->query("SELECT id FROM ttrss_feeds
-                       WHERE id = '$feed_id' AND owner_uid = ". $_SESSION["uid"]);
+               $sth = $this->pdo->prepare("SELECT id FROM ttrss_feeds
+                       WHERE id = ? AND owner_uid = ?");
+               $sth->execute([$feed_id, $_SESSION['uid']]);
 
-               if ($this->dbh->num_rows($result) != 0) {
+               if ($row = $sth->fetch()) {
                        @unlink(ICONS_DIR . "/$feed_id.ico");
 
-                       $this->dbh->query("UPDATE ttrss_feeds SET favicon_avg_color = NULL
-                               where id = '$feed_id'");
+                       $sth = $this->pdo->prepare("UPDATE ttrss_feeds SET favicon_avg_color = NULL
+                               where id = ?");
+                       $sth->execute([$feed_id]);
                }
-
-               return;
        }
 
        function uploadicon() {
                header("Content-type: text/html");
 
-               $tmp_file = false;
-
                if (is_uploaded_file($_FILES['icon_file']['tmp_name'])) {
                        $tmp_file = tempnam(CACHE_DIR . '/upload', 'icon');
 
@@ -494,20 +457,23 @@ class Pref_Feeds extends Handler_Protected {
                }
 
                $icon_file = $tmp_file;
-               $feed_id = $this->dbh->escape_string($_REQUEST["feed_id"]);
+               $feed_id = clean($_REQUEST["feed_id"]);
 
                if (is_file($icon_file) && $feed_id) {
                        if (filesize($icon_file) < 65535) {
 
-                               $result = $this->dbh->query("SELECT id FROM ttrss_feeds
-                                       WHERE id = '$feed_id' AND owner_uid = ". $_SESSION["uid"]);
+                               $sth = $this->pdo->prepare("SELECT id FROM ttrss_feeds
+                                       WHERE id = ? AND owner_uid = ?");
+                               $sth->execute([$feed_id, $_SESSION['uid']]);
 
-                               if ($this->dbh->num_rows($result) != 0) {
+                               if ($row = $sth->fetch()) {
                                        @unlink(ICONS_DIR . "/$feed_id.ico");
                                        if (rename($icon_file, ICONS_DIR . "/$feed_id.ico")) {
-                                               $this->dbh->query("UPDATE ttrss_feeds SET
+
+                                               $sth = $this->pdo->prepare("UPDATE ttrss_feeds SET
                                                        favicon_avg_color = ''
-                                                       WHERE id = '$feed_id'");
+                                                       WHERE id = ?");
+                                               $sth->execute([$feed_id]);
 
                                                $rc = 0;
                                        }
@@ -533,283 +499,283 @@ class Pref_Feeds extends Handler_Protected {
                global $purge_intervals;
                global $update_intervals;
 
-               print '<div dojoType="dijit.layout.TabContainer" style="height : 450px">
-                       <div dojoType="dijit.layout.ContentPane" title="'.__('General').'">';
 
-               $feed_id = $this->dbh->escape_string($_REQUEST["id"]);
+               $feed_id = clean($_REQUEST["id"]);
 
-               $result = $this->dbh->query(
-                       "SELECT * FROM ttrss_feeds WHERE id = '$feed_id' AND
-                               owner_uid = " . $_SESSION["uid"]);
+               $sth = $this->pdo->prepare("SELECT * FROM ttrss_feeds WHERE id = ? AND
+                               owner_uid = ?");
+               $sth->execute([$feed_id, $_SESSION['uid']]);
 
-               $auth_pass_encrypted = sql_bool_to_bool($this->dbh->fetch_result($result, 0,
-                       "auth_pass_encrypted"));
+               if ($row = $sth->fetch()) {
+                       print '<div dojoType="dijit.layout.TabContainer" style="height : 450px">
+                       <div dojoType="dijit.layout.ContentPane" title="'.__('General').'">';
 
-               $title = htmlspecialchars($this->dbh->fetch_result($result,
-                       0, "title"));
+                       $auth_pass_encrypted = $row["auth_pass_encrypted"];
 
-               print_hidden("id", "$feed_id");
-               print_hidden("op", "pref-feeds");
-               print_hidden("method", "editSave");
+                       $title = htmlspecialchars($row["title"]);
 
-               print "<div class=\"dlgSec\">".__("Feed")."</div>";
-               print "<div class=\"dlgSecCont\">";
+                       print_hidden("id", "$feed_id");
+                       print_hidden("op", "pref-feeds");
+                       print_hidden("method", "editSave");
+
+                       print "<div class=\"dlgSec\">".__("Feed")."</div>";
+                       print "<div class=\"dlgSecCont\">";
 
-               /* Title */
+                       /* Title */
 
-               print "<input dojoType=\"dijit.form.ValidationTextBox\" required=\"1\"
+                       print "<input dojoType=\"dijit.form.ValidationTextBox\" required=\"1\"
                        placeHolder=\"".__("Feed Title")."\"
                        style=\"font-size : 16px; width: 20em\" name=\"title\" value=\"$title\">";
 
-               /* Feed URL */
+                       /* Feed URL */
 
-               $feed_url = $this->dbh->fetch_result($result, 0, "feed_url");
-               $feed_url = htmlspecialchars($this->dbh->fetch_result($result,
-                       0, "feed_url"));
+                       $feed_url = htmlspecialchars($row["feed_url"]);
 
-               print "<hr/>";
+                       print "<hr/>";
 
-               print __('URL:') . " ";
-               print "<input dojoType=\"dijit.form.ValidationTextBox\" required=\"1\"
+                       print __('URL:') . " ";
+                       print "<input dojoType=\"dijit.form.ValidationTextBox\" required=\"1\"
                        placeHolder=\"".__("Feed URL")."\"
                        regExp='^(http|https)://.*' style=\"width : 20em\"
                        name=\"feed_url\" value=\"$feed_url\">";
 
-               $last_error = $this->dbh->fetch_result($result, 0, "last_error");
+                       $last_error = $row["last_error"];
 
-               if ($last_error) {
-                       print "&nbsp;<img src=\"images/error.png\" alt=\"(error)\"
+                       if ($last_error) {
+                               print "&nbsp;<img src=\"images/error.png\" alt=\"(error)\"
                                style=\"vertical-align : middle\"
                                title=\"".htmlspecialchars($last_error)."\">";
 
-               }
+                       }
 
-               /* Category */
+                       /* Category */
 
-               if (get_pref('ENABLE_FEED_CATS')) {
+                       if (get_pref('ENABLE_FEED_CATS')) {
 
-                       $cat_id = $this->dbh->fetch_result($result, 0, "cat_id");
+                               $cat_id = $row["cat_id"];
 
-                       print "<hr/>";
+                               print "<hr/>";
 
-                       print __('Place in category:') . " ";
+                               print __('Place in category:') . " ";
 
-                       print_feed_cat_select("cat_id", $cat_id,
-                               'dojoType="dijit.form.Select"');
-               }
+                               print_feed_cat_select("cat_id", $cat_id,
+                                       'dojoType="dijit.form.Select"');
+                       }
 
-               /* FTS Stemming Language */
+                       /* FTS Stemming Language */
 
-               if (DB_TYPE == "pgsql") {
-                       $feed_language = $this->dbh->fetch_result($result, 0, "feed_language");
+                       if (DB_TYPE == "pgsql") {
+                               $feed_language = $row["feed_language"];
 
-                       print "<hr/>";
+                               print "<hr/>";
 
-                       print __('Language:') . " ";
-                       print_select("feed_language", $feed_language, $this::$feed_languages,
-                               'dojoType="dijit.form.Select"');
-               }
+                               print __('Language:') . " ";
+                               print_select("feed_language", $feed_language, $this::$feed_languages,
+                                       'dojoType="dijit.form.Select"');
+                       }
 
-               print "</div>";
+                       print "</div>";
 
-               print "<div class=\"dlgSec\">".__("Update")."</div>";
-               print "<div class=\"dlgSecCont\">";
+                       print "<div class=\"dlgSec\">".__("Update")."</div>";
+                       print "<div class=\"dlgSecCont\">";
 
-               /* Update Interval */
+                       /* Update Interval */
 
-               $update_interval = $this->dbh->fetch_result($result, 0, "update_interval");
+                       $update_interval = $row["update_interval"];
 
-               print_select_hash("update_interval", $update_interval, $update_intervals,
-                       'dojoType="dijit.form.Select"');
+                       print_select_hash("update_interval", $update_interval, $update_intervals,
+                               'dojoType="dijit.form.Select"');
 
-               /* Purge intl */
+                       /* Purge intl */
 
-               $purge_interval = $this->dbh->fetch_result($result, 0, "purge_interval");
+                       $purge_interval = $row["purge_interval"];
 
-               print "<hr/>";
-               print __('Article purging:') . " ";
+                       print "<hr/>";
+                       print __('Article purging:') . " ";
 
-               print_select_hash("purge_interval", $purge_interval, $purge_intervals,
-                       'dojoType="dijit.form.Select" ' .
+                       print_select_hash("purge_interval", $purge_interval, $purge_intervals,
+                               'dojoType="dijit.form.Select" ' .
                                ((FORCE_ARTICLE_PURGE == 0) ? "" : 'disabled="1"'));
 
-               print "</div>";
+                       print "</div>";
 
-               $auth_login = htmlspecialchars($this->dbh->fetch_result($result, 0, "auth_login"));
-               $auth_pass = $this->dbh->fetch_result($result, 0, "auth_pass");
+                       $auth_login = htmlspecialchars($row["auth_login"]);
+                       $auth_pass = $row["auth_pass"];
 
-               if ($auth_pass_encrypted && function_exists("mcrypt_decrypt")) {
-                       require_once "crypt.php";
-                       $auth_pass = decrypt_string($auth_pass);
-               }
+                       if ($auth_pass_encrypted && function_exists("mcrypt_decrypt")) {
+                               require_once "crypt.php";
+                               $auth_pass = decrypt_string($auth_pass);
+                       }
 
-               $auth_pass = htmlspecialchars($auth_pass);
-               $auth_enabled = $auth_login !== '' || $auth_pass !== '';
+                       $auth_pass = htmlspecialchars($auth_pass);
+                       $auth_enabled = $auth_login !== '' || $auth_pass !== '';
 
-               $auth_style = $auth_enabled ? '' : 'display: none';
-               print "<div id='feedEditDlg_loginContainer' style='$auth_style'>";
-               print "<div class=\"dlgSec\">".__("Authentication")."</div>";
-               print "<div class=\"dlgSecCont\">";
+                       $auth_style = $auth_enabled ? '' : 'display: none';
+                       print "<div id='feedEditDlg_loginContainer' style='$auth_style'>";
+                       print "<div class=\"dlgSec\">".__("Authentication")."</div>";
+                       print "<div class=\"dlgSecCont\">";
 
-               print "<input dojoType=\"dijit.form.TextBox\" id=\"feedEditDlg_login\"
+                       print "<input dojoType=\"dijit.form.TextBox\" id=\"feedEditDlg_login\"
                        placeHolder=\"".__("Login")."\"
                        autocomplete=\"new-password\"
                        name=\"auth_login\" value=\"$auth_login\"><hr/>";
 
 
-               print "<input dojoType=\"dijit.form.TextBox\" type=\"password\" name=\"auth_pass\"
+                       print "<input dojoType=\"dijit.form.TextBox\" type=\"password\" name=\"auth_pass\"
                        autocomplete=\"new-password\"
                        placeHolder=\"".__("Password")."\"
                        value=\"$auth_pass\">";
 
-               print "<div dojoType=\"dijit.Tooltip\" connectId=\"feedEditDlg_login\" position=\"below\">
+                       print "<div dojoType=\"dijit.Tooltip\" connectId=\"feedEditDlg_login\" position=\"below\">
                        ".__('<b>Hint:</b> you need to fill in your login information if your feed requires authentication, except for Twitter feeds.')."
                        </div>";
 
-               print "</div></div>";
+                       print "</div></div>";
 
-               $auth_checked = $auth_enabled ? 'checked' : '';
-               print "<div style=\"clear : both\">
+                       $auth_checked = $auth_enabled ? 'checked' : '';
+                       print "<div style=\"clear : both\">
                                <input type=\"checkbox\" $auth_checked name=\"need_auth\" dojoType=\"dijit.form.CheckBox\" id=\"feedEditDlg_loginCheck\"
                                                onclick='checkboxToggleElement(this, \"feedEditDlg_loginContainer\")'>
                                        <label for=\"feedEditDlg_loginCheck\">".
-                                       __('This feed requires authentication.')."</div>";
+                               __('This feed requires authentication.')."</div>";
 
-               print '</div><div dojoType="dijit.layout.ContentPane" title="'.__('Options').'">';
+                       print '</div><div dojoType="dijit.layout.ContentPane" title="'.__('Options').'">';
 
-               //print "<div class=\"dlgSec\">".__("Options")."</div>";
-               print "<div class=\"dlgSecSimple\">";
+                       //print "<div class=\"dlgSec\">".__("Options")."</div>";
+                       print "<div class=\"dlgSecSimple\">";
 
-               $private = sql_bool_to_bool($this->dbh->fetch_result($result, 0, "private"));
+                       $private = $row["private"];
 
-               if ($private) {
-                       $checked = "checked=\"1\"";
-               } else {
-                       $checked = "";
-               }
+                       if ($private) {
+                               $checked = "checked=\"1\"";
+                       } else {
+                               $checked = "";
+                       }
 
-               print "<input dojoType=\"dijit.form.CheckBox\" type=\"checkbox\" name=\"private\" id=\"private\"
+                       print "<input dojoType=\"dijit.form.CheckBox\" type=\"checkbox\" name=\"private\" id=\"private\"
                        $checked>&nbsp;<label for=\"private\">".__('Hide from Popular feeds')."</label>";
 
-               $include_in_digest = sql_bool_to_bool($this->dbh->fetch_result($result, 0, "include_in_digest"));
+                       $include_in_digest = $row["include_in_digest"];
 
-               if ($include_in_digest) {
-                       $checked = "checked=\"1\"";
-               } else {
-                       $checked = "";
-               }
+                       if ($include_in_digest) {
+                               $checked = "checked=\"1\"";
+                       } else {
+                               $checked = "";
+                       }
 
-               print "<hr/><input dojoType=\"dijit.form.CheckBox\" type=\"checkbox\" id=\"include_in_digest\"
+                       print "<hr/><input dojoType=\"dijit.form.CheckBox\" type=\"checkbox\" id=\"include_in_digest\"
                        name=\"include_in_digest\"
                        $checked>&nbsp;<label for=\"include_in_digest\">".__('Include in e-mail digest')."</label>";
 
 
-               $always_display_enclosures = sql_bool_to_bool($this->dbh->fetch_result($result, 0, "always_display_enclosures"));
+                       $always_display_enclosures = $row["always_display_enclosures"];
 
-               if ($always_display_enclosures) {
-                       $checked = "checked";
-               } else {
-                       $checked = "";
-               }
+                       if ($always_display_enclosures) {
+                               $checked = "checked";
+                       } else {
+                               $checked = "";
+                       }
 
-               print "<hr/><input dojoType=\"dijit.form.CheckBox\" type=\"checkbox\" id=\"always_display_enclosures\"
+                       print "<hr/><input dojoType=\"dijit.form.CheckBox\" type=\"checkbox\" id=\"always_display_enclosures\"
                        name=\"always_display_enclosures\"
                        $checked>&nbsp;<label for=\"always_display_enclosures\">".__('Always display image attachments')."</label>";
 
-               $hide_images = sql_bool_to_bool($this->dbh->fetch_result($result, 0, "hide_images"));
+                       $hide_images = $row["hide_images"];
 
-               if ($hide_images) {
-                       $checked = "checked=\"1\"";
-               } else {
-                       $checked = "";
-               }
+                       if ($hide_images) {
+                               $checked = "checked=\"1\"";
+                       } else {
+                               $checked = "";
+                       }
 
-               print "<hr/><input dojoType=\"dijit.form.CheckBox\" type=\"checkbox\" id=\"hide_images\"
+                       print "<hr/><input dojoType=\"dijit.form.CheckBox\" type=\"checkbox\" id=\"hide_images\"
                name=\"hide_images\"
                        $checked>&nbsp;<label for=\"hide_images\">".
-               __('Do not embed images')."</label>";
+                               __('Do not embed images')."</label>";
 
-               $cache_images = sql_bool_to_bool($this->dbh->fetch_result($result, 0, "cache_images"));
+                       $cache_images = $row["cache_images"];
 
-               if ($cache_images) {
-                       $checked = "checked=\"1\"";
-               } else {
-                       $checked = "";
-               }
+                       if ($cache_images) {
+                               $checked = "checked=\"1\"";
+                       } else {
+                               $checked = "";
+                       }
 
-               print "<hr/><input dojoType=\"dijit.form.CheckBox\" type=\"checkbox\" id=\"cache_images\"
+                       print "<hr/><input dojoType=\"dijit.form.CheckBox\" type=\"checkbox\" id=\"cache_images\"
                name=\"cache_images\"
                        $checked>&nbsp;<label for=\"cache_images\">".
-               __('Cache media')."</label>";
+                               __('Cache media')."</label>";
 
-               $mark_unread_on_update = sql_bool_to_bool($this->dbh->fetch_result($result, 0, "mark_unread_on_update"));
+                       $mark_unread_on_update = $row["mark_unread_on_update"];
 
-               if ($mark_unread_on_update) {
-                       $checked = "checked";
-               } else {
-                       $checked = "";
-               }
+                       if ($mark_unread_on_update) {
+                               $checked = "checked";
+                       } else {
+                               $checked = "";
+                       }
 
-               print "<hr/><input dojoType=\"dijit.form.CheckBox\" type=\"checkbox\" id=\"mark_unread_on_update\"
+                       print "<hr/><input dojoType=\"dijit.form.CheckBox\" type=\"checkbox\" id=\"mark_unread_on_update\"
                        name=\"mark_unread_on_update\"
                        $checked>&nbsp;<label for=\"mark_unread_on_update\">".__('Mark updated articles as unread')."</label>";
 
-               print "</div>";
+                       print "</div>";
 
-               print '</div><div dojoType="dijit.layout.ContentPane" title="'.__('Icon').'">';
+                       print '</div><div dojoType="dijit.layout.ContentPane" title="'.__('Icon').'">';
 
-               /* Icon */
+                       /* Icon */
 
-               print "<div class=\"dlgSecSimple\">";
+                       print "<div class=\"dlgSecSimple\">";
 
-               print "<iframe name=\"icon_upload_iframe\"
-                       style=\"width: 400px; height: 100px; display: none;\"></iframe>";
+                       print "<img class=\"feedIcon\" src=\"".Feeds::getFeedIcon($feed_id)."\">";
 
-               print "<form style='display : block' target=\"icon_upload_iframe\"
+                       print "<iframe name=\"icon_upload_iframe\"
+                               style=\"width: 400px; height: 100px; display: none;\"></iframe>";
+
+                       print "<form style='display : block' target=\"icon_upload_iframe\"
                        enctype=\"multipart/form-data\" method=\"POST\"
                        action=\"backend.php\">
-                       <input id=\"icon_file\" size=\"10\" name=\"icon_file\" type=\"file\">
+                       <label class=\"dijitButton\">".__("Choose file...")."
+                               <input style=\"display: none\" id=\"icon_file\" size=\"10\" name=\"icon_file\" type=\"file\">
+                       </label>
                        <input type=\"hidden\" name=\"op\" value=\"pref-feeds\">
                        <input type=\"hidden\" name=\"feed_id\" value=\"$feed_id\">
-                       <input type=\"hidden\" name=\"method\" value=\"uploadicon\"><p>
+                       <input type=\"hidden\" name=\"method\" value=\"uploadicon\">                    
                        <button class=\"\" dojoType=\"dijit.form.Button\" onclick=\"return uploadFeedIcon();\"
                                type=\"submit\">".__('Replace')."</button>
-                       <button class=\"\" dojoType=\"dijit.form.Button\" onclick=\"return removeFeedIcon($feed_id);\"
+                       <button class=\"danger\" dojoType=\"dijit.form.Button\" onclick=\"return removeFeedIcon($feed_id);\"
                                type=\"submit\">".__('Remove')."</button>
                        </form>";
 
-               print "</div>";
+                       print "</div>";
 
-               print '</div><div dojoType="dijit.layout.ContentPane" title="'.__('Plugins').'">';
+                       print '</div><div dojoType="dijit.layout.ContentPane" title="'.__('Plugins').'">';
 
-               PluginHost::getInstance()->run_hooks(PluginHost::HOOK_PREFS_EDIT_FEED,
-                       "hook_prefs_edit_feed", $feed_id);
+                       PluginHost::getInstance()->run_hooks(PluginHost::HOOK_PREFS_EDIT_FEED,
+                               "hook_prefs_edit_feed", $feed_id);
 
 
-               print "</div></div>";
+                       print "</div></div>";
 
-               $title = htmlspecialchars($title, ENT_QUOTES);
+                       $title = htmlspecialchars($title, ENT_QUOTES);
 
-               print "<div class='dlgButtons'>
+                       print "<div class='dlgButtons'>
                        <div style=\"float : left\">
                        <button class=\"danger\" dojoType=\"dijit.form.Button\" onclick='return unsubscribeFeed($feed_id, \"$title\")'>".
                                __('Unsubscribe')."</button>";
 
-               print "</div>";
+                       print "</div>";
 
-               print "<button dojoType=\"dijit.form.Button\" onclick=\"return dijit.byId('feedEditDlg').execute()\">".__('Save')."</button>
-                       <button dojoType=\"dijit.form.Button\" onclick=\"return dijit.byId('feedEditDlg').hide()\">".__('Cancel')."</button>
-               </div>";
-
-
-               return;
+                       print "<button dojoType=\"dijit.form.Button\" onclick=\"return dijit.byId('feedEditDlg').execute()\">".__('Save')."</button>
+                               <button dojoType=\"dijit.form.Button\" onclick=\"return dijit.byId('feedEditDlg').hide()\">".__('Cancel')."</button>
+                               </div>";
+               }
        }
 
        function editfeeds() {
                global $purge_intervals;
                global $update_intervals;
 
-               $feed_ids = $this->dbh->escape_string($_REQUEST["ids"]);
+               $feed_ids = clean($_REQUEST["ids"]);
 
                print_notice("Enable the options you wish to apply using checkboxes on the right:");
 
@@ -958,72 +924,77 @@ class Pref_Feeds extends Handler_Protected {
 
        function editsaveops($batch) {
 
-               $feed_title = $this->dbh->escape_string(trim($_POST["title"]));
-               $feed_link = $this->dbh->escape_string(trim($_POST["feed_url"]));
-               $upd_intl = (int) $this->dbh->escape_string($_POST["update_interval"]);
-               $purge_intl = (int) $this->dbh->escape_string($_POST["purge_interval"]);
-               $feed_id = (int) $this->dbh->escape_string($_POST["id"]); /* editSave */
-               $feed_ids = $this->dbh->escape_string($_POST["ids"]); /* batchEditSave */
-               $cat_id = (int) $this->dbh->escape_string($_POST["cat_id"]);
-               $auth_login = $this->dbh->escape_string(trim($_POST["auth_login"]));
-               $auth_pass = trim($_POST["auth_pass"]);
-               $private = checkbox_to_sql_bool($this->dbh->escape_string($_POST["private"]));
+               $feed_title = trim(clean($_POST["title"]));
+               $feed_url = trim(clean($_POST["feed_url"]));
+               $upd_intl = (int) clean($_POST["update_interval"]);
+               $purge_intl = (int) clean($_POST["purge_interval"]);
+               $feed_id = (int) clean($_POST["id"]); /* editSave */
+               $feed_ids = explode(",", clean($_POST["ids"])); /* batchEditSave */
+               $cat_id = (int) clean($_POST["cat_id"]);
+               $auth_login = trim(clean($_POST["auth_login"]));
+               $auth_pass = trim(clean($_POST["auth_pass"]));
+               $private = checkbox_to_sql_bool(clean($_POST["private"]));
                $include_in_digest = checkbox_to_sql_bool(
-                       $this->dbh->escape_string($_POST["include_in_digest"]));
+                       clean($_POST["include_in_digest"]));
                $cache_images = checkbox_to_sql_bool(
-                       $this->dbh->escape_string($_POST["cache_images"]));
+                       clean($_POST["cache_images"]));
                $hide_images = checkbox_to_sql_bool(
-                       $this->dbh->escape_string($_POST["hide_images"]));
+                       clean($_POST["hide_images"]));
                $always_display_enclosures = checkbox_to_sql_bool(
-                       $this->dbh->escape_string($_POST["always_display_enclosures"]));
+                       clean($_POST["always_display_enclosures"]));
 
                $mark_unread_on_update = checkbox_to_sql_bool(
-                       $this->dbh->escape_string($_POST["mark_unread_on_update"]));
+                       clean($_POST["mark_unread_on_update"]));
 
-               $feed_language = $this->dbh->escape_string(trim($_POST["feed_language"]));
-
-               $auth_pass = $this->dbh->escape_string($auth_pass);
-
-               if (get_pref('ENABLE_FEED_CATS')) {
-                       if ($cat_id && $cat_id != 0) {
-                               $category_qpart = "cat_id = '$cat_id',";
-                               $category_qpart_nocomma = "cat_id = '$cat_id'";
-                       } else {
-                               $category_qpart = 'cat_id = NULL,';
-                               $category_qpart_nocomma = 'cat_id = NULL';
-                       }
-               } else {
-                       $category_qpart = "";
-                       $category_qpart_nocomma = "";
-               }
+               $feed_language = trim(clean($_POST["feed_language"]));
 
                if (!$batch) {
-                       if ($_POST["need_auth"] !== 'on') {
+                       if (clean($_POST["need_auth"]) !== 'on') {
                                $auth_login = '';
                                $auth_pass = '';
                        }
 
-                       $result = db_query("SELECT feed_url FROM ttrss_feeds WHERE id = " . $feed_id);
-                       $orig_feed_url = db_fetch_result($result, 0, "feed_url");
-
-                       $reset_basic_info = $orig_feed_url != $feed_link;
-
-                       $this->dbh->query("UPDATE ttrss_feeds SET
-                               $category_qpart
-                               title = '$feed_title', feed_url = '$feed_link',
-                               update_interval = '$upd_intl',
-                               purge_interval = '$purge_intl',
-                               auth_login = '$auth_login',
-                               auth_pass = '$auth_pass',
+                       $sth = $this->pdo->prepare("SELECT feed_url FROM ttrss_feeds WHERE id = ?");
+                       $sth->execute([$feed_id]);
+                       $row = $sth->fetch();
+                       $orig_feed_url = $row["feed_url"];
+
+                       $reset_basic_info = $orig_feed_url != $feed_url;
+
+                       $sth = $this->pdo->prepare("UPDATE ttrss_feeds SET
+                               cat_id = :cat_id,
+                               title = :title, 
+                               feed_url = :feed_url,
+                               update_interval = :upd_intl,
+                               purge_interval = :purge_intl,
+                               auth_login = :auth_login,
+                               auth_pass = :auth_pass,
                                auth_pass_encrypted = false,
-                               private = $private,
-                               cache_images = $cache_images,
-                               hide_images = $hide_images,
-                               include_in_digest = $include_in_digest,
-                               always_display_enclosures = $always_display_enclosures,
-                               mark_unread_on_update = $mark_unread_on_update,
-                               feed_language = '$feed_language'
-                       WHERE id = '$feed_id' AND owner_uid = " . $_SESSION["uid"]);
+                               private = :private,
+                               cache_images = :cache_images,
+                               hide_images = :hide_images,
+                               include_in_digest = :include_in_digest,
+                               always_display_enclosures = :always_display_enclosures,
+                               mark_unread_on_update = :mark_unread_on_update,
+                               feed_language = :feed_language
+                       WHERE id = :id AND owner_uid = :uid");
+
+                       $sth->execute([":title" => $feed_title,
+                                       ":cat_id" => $cat_id ? $cat_id : null,
+                                       ":feed_url" => $feed_url,
+                                       ":upd_intl" => $upd_intl,
+                                       ":purge_intl" => $purge_intl,
+                                       ":auth_login" => $auth_login,
+                                       ":auth_pass" => $auth_pass,
+                                       ":private" => (int)$private,
+                                       ":cache_images" => (int)$cache_images,
+                                       ":hide_images" => (int)$hide_images,
+                                       ":include_in_digest" => (int)$include_in_digest,
+                                       ":always_display_enclosures" => (int)$always_display_enclosures,
+                                       ":mark_unread_on_update" => (int)$mark_unread_on_update,
+                                       ":feed_language" => $feed_language,
+                                       ":id" => $feed_id,
+                                       ":uid" => $_SESSION['uid']]);
 
                        if ($reset_basic_info) {
                                RSSUtils::set_basic_feed_info($feed_id);
@@ -1037,11 +1008,13 @@ class Pref_Feeds extends Handler_Protected {
 
                        foreach (array_keys($_POST) as $k) {
                                if ($k != "op" && $k != "method" && $k != "ids") {
-                                       $feed_data[$k] = $_POST[$k];
+                                       $feed_data[$k] = clean($_POST[$k]);
                                }
                        }
 
-                       $this->dbh->query("BEGIN");
+                       $this->pdo->beginTransaction();
+
+                       $feed_ids_qmarks = arr_qmarks($feed_ids);
 
                        foreach (array_keys($feed_data) as $k) {
 
@@ -1049,79 +1022,87 @@ class Pref_Feeds extends Handler_Protected {
 
                                switch ($k) {
                                        case "title":
-                                               $qpart = "title = '$feed_title'";
+                                               $qpart = "title = " . $this->pdo->quote($feed_title);
                                                break;
 
                                        case "feed_url":
-                                               $qpart = "feed_url = '$feed_link'";
+                                               $qpart = "feed_url = " . $this->pdo->quote($feed_url);
                                                break;
 
                                        case "update_interval":
-                                               $qpart = "update_interval = '$upd_intl'";
+                                               $qpart = "update_interval = " . $this->pdo->quote($upd_intl);
                                                break;
 
                                        case "purge_interval":
-                                               $qpart = "purge_interval = '$purge_intl'";
+                                               $qpart = "purge_interval =" . $this->pdo->quote($purge_intl);
                                                break;
 
                                        case "auth_login":
-                                               $qpart = "auth_login = '$auth_login'";
+                                               $qpart = "auth_login = " . $this->pdo->quote($auth_login);
                                                break;
 
                                        case "auth_pass":
-                                               $qpart = "auth_pass = '$auth_pass', auth_pass_encrypted = false";
+                                               $qpart = "auth_pass =" . $this->pdo->quote($auth_pass). ", auth_pass_encrypted = false";
                                                break;
 
                                        case "private":
-                                               $qpart = "private = $private";
+                                               $qpart = "private = " . $this->pdo->quote($private);
                                                break;
 
                                        case "include_in_digest":
-                                               $qpart = "include_in_digest = $include_in_digest";
+                                               $qpart = "include_in_digest = " . $this->pdo->quote($include_in_digest);
                                                break;
 
                                        case "always_display_enclosures":
-                                               $qpart = "always_display_enclosures = $always_display_enclosures";
+                                               $qpart = "always_display_enclosures = " . $this->pdo->quote($always_display_enclosures);
                                                break;
 
                                        case "mark_unread_on_update":
-                                               $qpart = "mark_unread_on_update = $mark_unread_on_update";
+                                               $qpart = "mark_unread_on_update = " . $this->pdo->quote($mark_unread_on_update);
                                                break;
 
                                        case "cache_images":
-                                               $qpart = "cache_images = $cache_images";
+                                               $qpart = "cache_images = " . $this->pdo->quote($cache_images);
                                                break;
 
                                        case "hide_images":
-                                               $qpart = "hide_images = $hide_images";
+                                               $qpart = "hide_images = " . $this->pdo->quote($hide_images);
                                                break;
 
                                        case "cat_id":
-                                               $qpart = $category_qpart_nocomma;
+                                               if (get_pref('ENABLE_FEED_CATS')) {
+                                                       if ($cat_id) {
+                                                               $qpart = "cat_id = " . $this->pdo->quote($cat_id);
+                                                       } else {
+                                                               $qpart = 'cat_id = NULL';
+                                                       }
+                                               } else {
+                                                       $qpart = "";
+                                               }
+
                                                break;
 
                                        case "feed_language":
-                                               $qpart = "feed_language = '$feed_language'";
+                                               $qpart = "feed_language = " . $this->pdo->quote($feed_language);
                                                break;
 
                                }
 
                                if ($qpart) {
-                                       $this->dbh->query(
-                                               "UPDATE ttrss_feeds SET $qpart WHERE id IN ($feed_ids)
-                                               AND owner_uid = " . $_SESSION["uid"]);
-                                       print "<br/>";
+                                       $sth = $this->pdo->prepare("UPDATE ttrss_feeds SET $qpart WHERE id IN ($feed_ids_qmarks)
+                                               AND owner_uid = ?");
+                                       $sth->execute(array_merge($feed_ids, [$_SESSION['uid']]));
                                }
                        }
 
-                       $this->dbh->query("COMMIT");
+                       $this->pdo->commit();
                }
                return;
        }
 
        function remove() {
 
-               $ids = explode(",", $this->dbh->escape_string($_REQUEST["ids"]));
+               $ids = explode(",", clean($_REQUEST["ids"]));
 
                foreach ($ids as $id) {
                        Pref_Feeds::remove_feed($id, $_SESSION["uid"]);
@@ -1130,150 +1111,15 @@ class Pref_Feeds extends Handler_Protected {
                return;
        }
 
-       function clear() {
-               $id = $this->dbh->escape_string($_REQUEST["id"]);
-               $this->clear_feed_articles($id);
-       }
-
-       function rescore() {
-               $ids = explode(",", $this->dbh->escape_string($_REQUEST["ids"]));
-
-               foreach ($ids as $id) {
-
-                       $filters = load_filters($id, $_SESSION["uid"], 6);
-
-                       $result = $this->dbh->query("SELECT
-                               title, content, link, ref_id, author,".
-                               SUBSTRING_FOR_DATE."(updated, 1, 19) AS updated
-                               FROM
-                                       ttrss_user_entries, ttrss_entries
-                                       WHERE ref_id = id AND feed_id = '$id' AND
-                                               owner_uid = " .$_SESSION['uid']."
-                                       ");
-
-                       $scores = array();
-
-                       while ($line = $this->dbh->fetch_assoc($result)) {
-
-                               $tags = Article::get_article_tags($line["ref_id"]);
-
-                               $article_filters = RSSUtils::get_article_filters($filters, $line['title'],
-                                       $line['content'], $line['link'], strtotime($line['updated']),
-                                       $line['author'], $tags);
-
-                               $new_score = RSSUtils::calculate_article_score($article_filters);
-
-                               if (!$scores[$new_score]) $scores[$new_score] = array();
-
-                               array_push($scores[$new_score], $line['ref_id']);
-                       }
-
-                       foreach (array_keys($scores) as $s) {
-                               if ($s > 1000) {
-                                       $this->dbh->query("UPDATE ttrss_user_entries SET score = '$s',
-                                               marked = true WHERE
-                                               ref_id IN (" . join(',', $scores[$s]) . ")");
-                               } else if ($s < -500) {
-                                       $this->dbh->query("UPDATE ttrss_user_entries SET score = '$s',
-                                               unread = false WHERE
-                                               ref_id IN (" . join(',', $scores[$s]) . ")");
-                               } else {
-                                       $this->dbh->query("UPDATE ttrss_user_entries SET score = '$s' WHERE
-                                               ref_id IN (" . join(',', $scores[$s]) . ")");
-                               }
-                       }
-               }
-
-               print __("All done.");
-
-       }
-
-       function rescoreAll() {
-
-               $result = $this->dbh->query(
-                       "SELECT id FROM ttrss_feeds WHERE owner_uid = " . $_SESSION['uid']);
-
-               while ($feed_line = $this->dbh->fetch_assoc($result)) {
-
-                       $id = $feed_line["id"];
-
-                       $filters = load_filters($id, $_SESSION["uid"], 6);
-
-                       $tmp_result = $this->dbh->query("SELECT
-                               title, content, link, ref_id, author,".
-                                       SUBSTRING_FOR_DATE."(updated, 1, 19) AS updated
-                                       FROM
-                                       ttrss_user_entries, ttrss_entries
-                                       WHERE ref_id = id AND feed_id = '$id' AND
-                                               owner_uid = " .$_SESSION['uid']."
-                                       ");
-
-                       $scores = array();
-
-                       while ($line = $this->dbh->fetch_assoc($tmp_result)) {
-
-                               $tags = Article::get_article_tags($line["ref_id"]);
-
-                               $article_filters = RSSUtils::get_article_filters($filters, $line['title'],
-                                       $line['content'], $line['link'], strtotime($line['updated']),
-                                       $line['author'], $tags);
-
-                               $new_score = RSSUtils::calculate_article_score($article_filters);
-
-                               if (!$scores[$new_score]) $scores[$new_score] = array();
-
-                               array_push($scores[$new_score], $line['ref_id']);
-                       }
-
-                       foreach (array_keys($scores) as $s) {
-                               if ($s > 1000) {
-                                       $this->dbh->query("UPDATE ttrss_user_entries SET score = '$s',
-                                               marked = true WHERE
-                                               ref_id IN (" . join(',', $scores[$s]) . ")");
-                               } else {
-                                       $this->dbh->query("UPDATE ttrss_user_entries SET score = '$s' WHERE
-                                               ref_id IN (" . join(',', $scores[$s]) . ")");
-                               }
-                       }
-               }
-
-               print __("All done.");
-
-       }
-
-       function categorize() {
-               $ids = explode(",", $this->dbh->escape_string($_REQUEST["ids"]));
-
-               $cat_id = $this->dbh->escape_string($_REQUEST["cat_id"]);
-
-               if ($cat_id == 0) {
-                       $cat_id_qpart = 'NULL';
-               } else {
-                       $cat_id_qpart = "'$cat_id'";
-               }
-
-               $this->dbh->query("BEGIN");
-
-               foreach ($ids as $id) {
-
-                       $this->dbh->query("UPDATE ttrss_feeds SET cat_id = $cat_id_qpart
-                               WHERE id = '$id'
-                               AND owner_uid = " . $_SESSION["uid"]);
-
-               }
-
-               $this->dbh->query("COMMIT");
-       }
-
        function removeCat() {
-               $ids = explode(",", $this->dbh->escape_string($_REQUEST["ids"]));
+               $ids = explode(",", clean($_REQUEST["ids"]));
                foreach ($ids as $id) {
                        $this->remove_feed_category($id, $_SESSION["uid"]);
                }
        }
 
        function addCat() {
-               $feed_cat = $this->dbh->escape_string(trim($_REQUEST["cat"]));
+               $feed_cat = trim(clean($_REQUEST["cat"]));
 
                add_feed_category($feed_cat);
        }
@@ -1283,10 +1129,15 @@ class Pref_Feeds extends Handler_Protected {
                print "<div dojoType=\"dijit.layout.AccordionContainer\" region=\"center\">";
                print "<div id=\"pref-feeds-feeds\" dojoType=\"dijit.layout.AccordionPane\" title=\"".__('Feeds')."\">";
 
-               $result = $this->dbh->query("SELECT COUNT(id) AS num_errors
-                       FROM ttrss_feeds WHERE last_error != '' AND owner_uid = ".$_SESSION["uid"]);
+               $sth = $this->pdo->prepare("SELECT COUNT(id) AS num_errors
+                       FROM ttrss_feeds WHERE last_error != '' AND owner_uid = ?");
+               $sth->execute([$_SESSION['uid']]);
 
-               $num_errors = $this->dbh->fetch_result($result, 0, "num_errors");
+               if ($row = $sth->fetch()) {
+                       $num_errors = $row["num_errors"];
+               } else {
+                       $num_errors = 0;
+               }
 
                if ($num_errors > 0) {
 
@@ -1301,7 +1152,7 @@ class Pref_Feeds extends Handler_Protected {
                                onclick=\"showInactiveFeeds()\">" .
                                __("Inactive feeds") . "</button>";
 
-               $feed_search = $this->dbh->escape_string($_REQUEST["search"]);
+               $feed_search = clean($_REQUEST["search"]);
 
                if (array_key_exists("search", $_REQUEST)) {
                        $_SESSION["prefs_feed_search"] = $feed_search;
@@ -1361,24 +1212,6 @@ class Pref_Feeds extends Handler_Protected {
                print $error_button;
                print $inactive_button;
 
-               if (defined('_ENABLE_FEED_DEBUGGING')) {
-
-                       print "<select id=\"feedActionChooser\" onchange=\"feedActionChange()\">
-                               <option value=\"facDefault\" selected>".__('More actions...')."</option>";
-
-                       if (FORCE_ARTICLE_PURGE == 0) {
-                               print
-                                       "<option value=\"facPurge\">".__('Manual purge')."</option>";
-                       }
-
-                       print "
-                               <option value=\"facClear\">".__('Clear feed data')."</option>
-                               <option value=\"facRescore\">".__('Rescore articles')."</option>";
-
-                       print "</select>";
-
-               }
-
                print "</div>"; # toolbar
 
                //print '</div>';
@@ -1438,7 +1271,9 @@ class Pref_Feeds extends Handler_Protected {
                print "<form  name=\"opml_form\" style='display : block' target=\"upload_iframe\"
                        enctype=\"multipart/form-data\" method=\"POST\"
                        action=\"backend.php\">
-                       <input id=\"opml_file\" name=\"opml_file\" type=\"file\">&nbsp;
+                       <label class=\"dijitButton\">".__("Choose file...")."
+                               <input style=\"display : none\" id=\"opml_file\" name=\"opml_file\" type=\"file\">&nbsp;
+                       </label>
                        <input type=\"hidden\" name=\"op\" value=\"dlg\">
                        <input type=\"hidden\" name=\"method\" value=\"importOpml\">
                        <button dojoType=\"dijit.form.Button\" onclick=\"return opmlImport();\" type=\"submit\">" .
@@ -1449,7 +1284,7 @@ class Pref_Feeds extends Handler_Protected {
                $opml_export_filename = "TinyTinyRSS_".date("Y-m-d").".opml";
 
                print "<p>" . __('Filename:') .
-            " <input type=\"text\" id=\"filename\" value=\"$opml_export_filename\" />&nbsp;" .
+            " <input class=\"input input-text\" type=\"text\" id=\"filename\" value=\"$opml_export_filename\" />&nbsp;" .
                                __('Include settings') . "<input type=\"checkbox\" id=\"settings\" checked=\"1\"/>";
 
                print "</p><button dojoType=\"dijit.form.Button\"
@@ -1568,17 +1403,18 @@ class Pref_Feeds extends Handler_Protected {
                        $interval_qpart = "DATE_SUB(NOW(), INTERVAL 3 MONTH)";
                }
 
-               $result = $this->dbh->query("SELECT ttrss_feeds.title, ttrss_feeds.site_url,
+               $sth = $this->pdo->prepare("SELECT ttrss_feeds.title, ttrss_feeds.site_url,
                                ttrss_feeds.feed_url, ttrss_feeds.id, MAX(updated) AS last_article
                        FROM ttrss_feeds, ttrss_entries, ttrss_user_entries WHERE
                                (SELECT MAX(updated) FROM ttrss_entries, ttrss_user_entries WHERE
                                        ttrss_entries.id = ref_id AND
                                                ttrss_user_entries.feed_id = ttrss_feeds.id) < $interval_qpart
-                       AND ttrss_feeds.owner_uid = ".$_SESSION["uid"]." AND
+                       AND ttrss_feeds.owner_uid = ? AND
                                ttrss_user_entries.feed_id = ttrss_feeds.id AND
                                ttrss_entries.id = ref_id
                        GROUP BY ttrss_feeds.title, ttrss_feeds.id, ttrss_feeds.site_url, ttrss_feeds.feed_url
                        ORDER BY last_article");
+               $sth->execute([$_SESSION['uid']]);
 
                print "<p" .__("These feeds have not been updated with new content for 3 months (oldest first):") . "</p>";
 
@@ -1599,7 +1435,7 @@ class Pref_Feeds extends Handler_Protected {
 
                $lnum = 1;
 
-               while ($line = $this->dbh->fetch_assoc($result)) {
+               while ($line = $sth->fetch()) {
 
                        $feed_id = $line["id"];
                        $this_row_id = "id=\"FUPDD-$feed_id\"";
@@ -1643,8 +1479,9 @@ class Pref_Feeds extends Handler_Protected {
        }
 
        function feedsWithErrors() {
-               $result = $this->dbh->query("SELECT id,title,feed_url,last_error,site_url
-               FROM ttrss_feeds WHERE last_error != '' AND owner_uid = ".$_SESSION["uid"]);
+               $sth = $this->pdo->prepare("SELECT id,title,feed_url,last_error,site_url
+                       FROM ttrss_feeds WHERE last_error != '' AND owner_uid = ?");
+               $sth->execute([$_SESSION['uid']]);
 
                print "<div dojoType=\"dijit.Toolbar\">";
                print "<div dojoType=\"dijit.form.DropDownButton\">".
@@ -1663,7 +1500,7 @@ class Pref_Feeds extends Handler_Protected {
 
                $lnum = 1;
 
-               while ($line = $this->dbh->fetch_assoc($result)) {
+               while ($line = $sth->fetch()) {
 
                        $feed_id = $line["id"];
                        $this_row_id = "id=\"FERDD-$feed_id\"";
@@ -1707,33 +1544,11 @@ class Pref_Feeds extends Handler_Protected {
                print "</div>";
        }
 
-       /**
-        * Purge a feed contents, marked articles excepted.
-        *
-        * @param mixed $link The database connection.
-        * @param integer $id The id of the feed to purge.
-        * @return void
-        */
-       private function clear_feed_articles($id) {
-
-               if ($id != 0) {
-                       $result = $this->dbh->query("DELETE FROM ttrss_user_entries
-                       WHERE feed_id = '$id' AND marked = false AND owner_uid = " . $_SESSION["uid"]);
-               } else {
-                       $result = $this->dbh->query("DELETE FROM ttrss_user_entries
-                       WHERE feed_id IS NULL AND marked = false AND owner_uid = " . $_SESSION["uid"]);
-               }
-
-               $result = $this->dbh->query("DELETE FROM ttrss_entries WHERE
-                       (SELECT COUNT(int_id) FROM ttrss_user_entries WHERE ref_id = id) = 0");
-
-               CCache::update($id, $_SESSION['uid']);
-       } // function clear_feed_articles
-
        private function remove_feed_category($id, $owner_uid) {
 
-               $this->dbh->query("DELETE FROM ttrss_feed_categories
-                       WHERE id = '$id' AND owner_uid = $owner_uid");
+               $sth = $this->pdo->prepare("DELETE FROM ttrss_feed_categories
+                       WHERE id = ? AND owner_uid = ?");
+               $sth->execute([$id, $owner_uid]);
 
                CCache::remove($id, $owner_uid, true);
        }
@@ -1748,51 +1563,63 @@ class Pref_Feeds extends Handler_Protected {
                        }
                }
 
+               $pdo = Db::pdo();
+
                if ($id > 0) {
+                       $pdo->beginTransaction();
 
                        /* save starred articles in Archived feed */
 
-                       db_query("BEGIN");
-
                        /* prepare feed if necessary */
 
-                       $result = db_query("SELECT feed_url FROM ttrss_feeds WHERE id = $id
-                               AND owner_uid = $owner_uid");
+                       $sth = $pdo->prepare("SELECT feed_url FROM ttrss_feeds WHERE id = ?
+                               AND owner_uid = ?");
+                       $sth->execute([$id, $owner_uid]);
 
-                       $feed_url = db_escape_string(db_fetch_result($result, 0, "feed_url"));
+                       if ($row = $sth->fetch()) {
+                               $feed_url = $row["feed_url"];
 
-                       $result = db_query("SELECT id FROM ttrss_archived_feeds
-                               WHERE feed_url = '$feed_url' AND owner_uid = $owner_uid");
+                               $sth = $pdo->prepare("SELECT id FROM ttrss_archived_feeds
+                                       WHERE feed_url = ? AND owner_uid = ?");
+                               $sth->execute([$feed_url, $owner_uid]);
 
-                       if (db_num_rows($result) == 0) {
-                               $result = db_query("SELECT MAX(id) AS id FROM ttrss_archived_feeds");
-                               $new_feed_id = (int)db_fetch_result($result, 0, "id") + 1;
+                               if ($row = $sth->fetch()) {
+                                       $archive_id = $row["id"];
+                               } else {
+                                       $res = $pdo->query("SELECT MAX(id) AS id FROM ttrss_archived_feeds");
+                                       $row = $res->fetch();
 
-                               db_query("INSERT INTO ttrss_archived_feeds
-                                       (id, owner_uid, title, feed_url, site_url)
-                               SELECT $new_feed_id, owner_uid, title, feed_url, site_url from ttrss_feeds
-                               WHERE id = '$id'");
+                                       $new_feed_id = (int)$row['id'] + 1;
 
-                               $archive_id = $new_feed_id;
-                       } else {
-                               $archive_id = db_fetch_result($result, 0, "id");
-                       }
+                                       $sth = $pdo->prepare("INSERT INTO ttrss_archived_feeds
+                                               (id, owner_uid, title, feed_url, site_url)
+                                                       SELECT ?, owner_uid, title, feed_url, site_url from ttrss_feeds
+                                                       WHERE id = ?");
+                                       $sth->execute([$new_feed_id, $id]);
 
-                       db_query("UPDATE ttrss_user_entries SET feed_id = NULL,
-                               orig_feed_id = '$archive_id' WHERE feed_id = '$id' AND
-                                       marked = true AND owner_uid = $owner_uid");
+                                       $archive_id = $new_feed_id;
+                               }
+
+                               $sth = $pdo->prepare("UPDATE ttrss_user_entries SET feed_id = NULL,
+                                       orig_feed_id = ? WHERE feed_id = ? AND
+                                               marked = true AND owner_uid = ?");
 
-                       /* Remove access key for the feed */
+                               $sth->execute([$archive_id, $id, $owner_uid]);
 
-                       db_query("DELETE FROM ttrss_access_keys WHERE
-                               feed_id = '$id' AND owner_uid = $owner_uid");
+                               /* Remove access key for the feed */
 
-                       /* remove the feed */
+                               $sth = $pdo->prepare("DELETE FROM ttrss_access_keys WHERE
+                                       feed_id = ? AND owner_uid = ?");
+                               $sth->execute([$id, $owner_uid]);
 
-                       db_query("DELETE FROM ttrss_feeds
-                                       WHERE id = '$id' AND owner_uid = $owner_uid");
+                               /* remove the feed */
 
-                       db_query("COMMIT");
+                               $sth = $pdo->prepare("DELETE FROM ttrss_feeds
+                                       WHERE id = ? AND owner_uid = ?");
+                               $sth->execute([$id, $owner_uid]);
+                       }
+
+                       $pdo->commit();
 
                        if (file_exists(ICONS_DIR . "/$id.ico")) {
                                unlink(ICONS_DIR . "/$id.ico");
@@ -1856,39 +1683,31 @@ class Pref_Feeds extends Handler_Protected {
        }
 
        function batchAddFeeds() {
-               $cat_id = $this->dbh->escape_string($_REQUEST['cat']);
-               $feeds = explode("\n", $_REQUEST['feeds']);
-               $login = $this->dbh->escape_string($_REQUEST['login']);
-               $pass = trim($_REQUEST['pass']);
+               $cat_id = clean($_REQUEST['cat']);
+               $feeds = explode("\n", clean($_REQUEST['feeds']));
+               $login = clean($_REQUEST['login']);
+               $pass = trim(clean($_REQUEST['pass']));
 
                foreach ($feeds as $feed) {
-                       $feed = $this->dbh->escape_string(trim($feed));
+                       $feed = trim($feed);
 
                        if (validate_feed_url($feed)) {
 
-                               $this->dbh->query("BEGIN");
-
-                               if ($cat_id == "0" || !$cat_id) {
-                                       $cat_qpart = "NULL";
-                               } else {
-                                       $cat_qpart = "'$cat_id'";
-                               }
+                               $this->pdo->beginTransaction();
 
-                               $result = $this->dbh->query(
-                                       "SELECT id FROM ttrss_feeds
-                                       WHERE feed_url = '$feed' AND owner_uid = ".$_SESSION["uid"]);
+                               $sth = $this->pdo->prepare("SELECT id FROM ttrss_feeds
+                                               WHERE feed_url = ? AND owner_uid = ?");
+                               $sth->execute([$feed, $_SESSION['uid']]);
 
-                               $pass = $this->dbh->escape_string($pass);
-
-                               if ($this->dbh->num_rows($result) == 0) {
-                                       $result = $this->dbh->query(
-                                               "INSERT INTO ttrss_feeds
+                               if (!$sth->fetch()) {
+                                       $sth = $this->pdo->prepare("INSERT INTO ttrss_feeds
                                                        (owner_uid,feed_url,title,cat_id,auth_login,auth_pass,update_method,auth_pass_encrypted)
-                                               VALUES ('".$_SESSION["uid"]."', '$feed',
-                                                       '[Unknown]', $cat_qpart, '$login', '$pass', 0, false)");
+                                               VALUES (?, ?, '[Unknown]', ?, ?, ?, 0, false)");
+
+                                       $sth->execute([$_SESSION['uid'], $feed, $cat_id ? $cat_id : null, $login, $pass]);
                                }
 
-                               $this->dbh->query("COMMIT");
+                               $this->pdo->commit();
                        }
                }
        }
@@ -1903,8 +1722,8 @@ class Pref_Feeds extends Handler_Protected {
        }
 
        function regenFeedKey() {
-               $feed_id = $this->dbh->escape_string($_REQUEST['id']);
-               $is_cat = $this->dbh->escape_string($_REQUEST['is_cat']) == "true";
+               $feed_id = clean($_REQUEST['id']);
+               $is_cat = clean($_REQUEST['is_cat']) == "true";
 
                $new_key = $this->update_feed_access_key($feed_id, $is_cat);
 
@@ -1915,30 +1734,19 @@ class Pref_Feeds extends Handler_Protected {
        private function update_feed_access_key($feed_id, $is_cat, $owner_uid = false) {
                if (!$owner_uid) $owner_uid = $_SESSION["uid"];
 
-               $sql_is_cat = bool_to_sql_bool($is_cat);
-
-               $result = $this->dbh->query("SELECT access_key FROM ttrss_access_keys
-                       WHERE feed_id = '$feed_id'      AND is_cat = $sql_is_cat
-                       AND owner_uid = " . $owner_uid);
+               // clear old value and generate new one
+               $sth = $this->pdo->prepare("DELETE FROM ttrss_access_keys
+                       WHERE feed_id = ? AND is_cat = ? AND owner_uid = ?");
+               $sth->execute([$feed_id, $is_cat, $owner_uid]);
 
-               if ($this->dbh->num_rows($result) == 1) {
-                       $key = $this->dbh->escape_string(uniqid_short());
-
-                       $this->dbh->query("UPDATE ttrss_access_keys SET access_key = '$key'
-                               WHERE feed_id = '$feed_id' AND is_cat = $sql_is_cat
-                               AND owner_uid = " . $owner_uid);
-
-                       return $key;
-
-               } else {
-                       return get_feed_access_key($feed_id, $is_cat, $owner_uid);
-               }
+               return get_feed_access_key($feed_id, $is_cat, $owner_uid);
        }
 
        // Silent
        function clearKeys() {
-               $this->dbh->query("DELETE FROM ttrss_access_keys WHERE
-                       owner_uid = " . $_SESSION["uid"]);
+               $sth = $this->pdo->prepare("DELETE FROM ttrss_access_keys WHERE
+                       owner_uid = ?");
+               $sth->execute([$_SESSION['uid']]);
        }
 
        private function calculate_children_count($cat) {
@@ -1962,13 +1770,16 @@ class Pref_Feeds extends Handler_Protected {
                        $interval_qpart = "DATE_SUB(NOW(), INTERVAL 3 MONTH)";
                }
 
-               $result = $this->dbh->query("SELECT COUNT(*) AS num_inactive FROM ttrss_feeds WHERE
+               $sth = $this->pdo->prepare("SELECT COUNT(id) AS num_inactive FROM ttrss_feeds WHERE
                                (SELECT MAX(updated) FROM ttrss_entries, ttrss_user_entries WHERE
                                        ttrss_entries.id = ref_id AND
                                                ttrss_user_entries.feed_id = ttrss_feeds.id) < $interval_qpart AND
-                         ttrss_feeds.owner_uid = ".$_SESSION["uid"]);
+                         ttrss_feeds.owner_uid = ?");
+               $sth->execute([$_SESSION['uid']]);
 
-               print (int) $this->dbh->fetch_result($result, 0, "num_inactive");
+               if ($row = $sth->fetch()) {
+                       print (int)$row["num_inactive"];
+               }
        }
 
        static function subscribe_to_feed_url() {