]> git.wh0rd.org - tt-rss.git/blobdiff - classes/feeds.php
feeds: right before queryfeedheadlines()
[tt-rss.git] / classes / feeds.php
index 99eb0fbf2d8c6b22ca92c96568af7eabcfc2fd74..3ab3fc44e93796204a67952bf5a02464312ae61b 100755 (executable)
@@ -193,24 +193,28 @@ class Feeds extends Handler_Protected {
 
                        if (!$any_needs_curl) {
 
-                               $result = $this->dbh->query(
-                                               "SELECT cache_images," . SUBSTRING_FOR_DATE . "(last_updated,1,19) AS last_updated
-                                               FROM ttrss_feeds WHERE id = '$feed'");
+                               $sth = $this->pdo->prepare("SELECT cache_images," . SUBSTRING_FOR_DATE . "(last_updated,1,19) AS last_updated
+                                               FROM ttrss_feeds WHERE id = ?");
+                               $sth->execute([$feed]);
 
-                               if ($this->dbh->num_rows($result) != 0) {
-                                       $last_updated = strtotime($this->dbh->fetch_result($result, 0, "last_updated"));
-                                       $cache_images = sql_bool_to_bool($this->dbh->fetch_result($result, 0, "cache_images"));
+                               if ($row = $sth->fetch()) {
+                                       $last_updated = strtotime($row["last_updated"]);
+                                       $cache_images = sql_bool_to_bool($row["cache_images"]);
 
                                        if (!$cache_images && time() - $last_updated > 120) {
                                                RSSUtils::update_rss_feed($feed, true);
                                        } else {
-                                               $this->dbh->query("UPDATE ttrss_feeds SET last_updated = '1970-01-01', last_update_started = '1970-01-01'
-                                                               WHERE id = '$feed'");
+                                               $sth = $this->pdo->prepare("UPDATE ttrss_feeds 
+                                SET last_updated = '1970-01-01', last_update_started = '1970-01-01'
+                                                               WHERE id = ?");
+                                               $sth->execute([$feed]);
                                        }
                                }
                        } else {
-                               $this->dbh->query("UPDATE ttrss_feeds SET last_updated = '1970-01-01', last_update_started = '1970-01-01'
-                                                               WHERE id = '$feed'");
+                               $sth = $this->pdo->prepare("UPDATE ttrss_feeds 
+                                SET last_updated = '1970-01-01', last_update_started = '1970-01-01'
+                                                               WHERE id = ?");
+                               $sth->execute([$feed]);
                        }
                }
 
@@ -221,16 +225,16 @@ class Feeds extends Handler_Protected {
                // FIXME: might break tag display?
 
                if (is_numeric($feed) && $feed > 0 && !$cat_view) {
-                       $result = $this->dbh->query(
-                               "SELECT id FROM ttrss_feeds WHERE id = '$feed' LIMIT 1");
+                       $sth = $this->pdo->prepare("SELECT id FROM ttrss_feeds WHERE id = ? LIMIT 1");
+                       $sth->execute([$feed]);
 
-                       if ($this->dbh->num_rows($result) == 0) {
+                       if (!$sth->fetch()) {
                                $reply['content'] = "<div align='center'>".__('Feed not found.')."</div>";
                        }
                }
 
-               @$search = $this->dbh->escape_string($_REQUEST["query"]);
-               @$search_language = $this->dbh->escape_string($_REQUEST["search_language"]); // PGSQL only
+               @$search = db_escape_string($_REQUEST["query"]);
+               @$search_language = db_escape_string($_REQUEST["search_language"]); // PGSQL only
 
                if ($search) {
                        $disable_cache = true;
@@ -238,7 +242,6 @@ class Feeds extends Handler_Protected {
 
                if ($_REQUEST["debug"]) $timing_info = print_checkpoint("H0", $timing_info);
 
-
                if (!$cat_view && is_numeric($feed) && $feed < PLUGIN_FEED_BASE_INDEX && $feed > LABEL_BASE_INDEX) {
                        $handler = PluginHost::getInstance()->get_feed_handler(
                                PluginHost::feed_to_pfeed_id($feed));
@@ -300,7 +303,7 @@ class Feeds extends Handler_Protected {
                        $feed, $cat_view, $search,
                        $last_error, $last_updated);
 
-               $headlines_count = is_numeric($result) ? 0 : $this->dbh->num_rows($result);
+               $headlines_count = is_numeric($result) ? 0 : db_num_rows($result);
 
                if ($offset == 0) {
                        foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_HEADLINES_BEFORE) as $p) {
@@ -315,13 +318,12 @@ class Feeds extends Handler_Protected {
                        $lnum = $offset;
 
                        $num_unread = 0;
-                       $cur_feed_title = '';
 
                        if ($_REQUEST["debug"]) $timing_info = print_checkpoint("PS", $timing_info);
 
                        $expand_cdm = get_pref('CDM_EXPANDED');
 
-                       while ($line = $this->dbh->fetch_assoc($result)) {
+                       while ($line = db_fetch_assoc($result)) {
 
                                $line["content_preview"] =  "&mdash; " . truncate_string(strip_tags($line["content"]), 250);
 
@@ -672,18 +674,17 @@ class Feeds extends Handler_Protected {
 
                                        if ($line["orig_feed_id"]) {
 
-                                               $tmp_result = $this->dbh->query("SELECT * FROM ttrss_archived_feeds
-                                                       WHERE id = ".$line["orig_feed_id"] . " AND owner_uid = " . $_SESSION["uid"]);
+                                               $ofgh = $this->pdo->prepare("SELECT * FROM ttrss_archived_feeds
+                                                       WHERE id = ? AND owner_uid = ?");
+                                               $ofgh->execute([$line["orig_feed_id"], $_SESSION['uid']]);
 
-                                               if ($this->dbh->num_rows($tmp_result) != 0) {
+                                               if ($tmp_line = $ofgh->fetch()) {
 
                                                        $tmp_content .= "<div clear='both'>";
                                                        $tmp_content .= __("Originally from:");
 
                                                        $tmp_content .= "&nbsp;";
 
-                                                       $tmp_line = $this->dbh->fetch_assoc($tmp_result);
-
                                                        $tmp_content .= "<a target='_blank' rel='noopener noreferrer'
                                                                href=' " . htmlspecialchars($tmp_line['site_url']) . "'>" .
                                                                $tmp_line['title'] . "</a>";
@@ -802,18 +803,21 @@ class Feeds extends Handler_Protected {
 
                                $reply['content'] .= "<p><span class=\"insensitive\">";
 
-                               $result = $this->dbh->query("SELECT ".SUBSTRING_FOR_DATE."(MAX(last_updated), 1, 19) AS last_updated FROM ttrss_feeds
-                                       WHERE owner_uid = " . $_SESSION['uid']);
+                               $sth = $this->pdo->prepare("SELECT ".SUBSTRING_FOR_DATE."(MAX(last_updated), 1, 19) AS last_updated FROM ttrss_feeds
+                                       WHERE owner_uid = ?");
+                               $sth->execute([$_SESSION['uid']]);
+                               $row = $sth->fetch();
 
-                               $last_updated = $this->dbh->fetch_result($result, 0, "last_updated");
-                               $last_updated = make_local_datetime($last_updated, false);
+                               $last_updated = make_local_datetime($row["last_updated"], false);
 
                                $reply['content'] .= sprintf(__("Feeds last updated at %s"), $last_updated);
 
-                               $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']]);
+                               $row = $sth->fetch();
 
-                               $num_errors = $this->dbh->fetch_result($result, 0, "num_errors");
+                               $num_errors = $row["num_errors"];
 
                                if ($num_errors > 0) {
                                        $reply['content'] .= "<br/>";
@@ -834,8 +838,10 @@ class Feeds extends Handler_Protected {
        }
 
        function catchupAll() {
-               $this->dbh->query("UPDATE ttrss_user_entries SET
-                                               last_read = NOW(), unread = false WHERE unread = true AND owner_uid = " . $_SESSION["uid"]);
+               $sth = $this->pdo->prepare("UPDATE ttrss_user_entries SET
+                                               last_read = NOW(), unread = false WHERE unread = true AND owner_uid = ?");
+               $sth->execute([$_SESSION['uid']]);
+
                CCache::zero_all($_SESSION["uid"]);
        }
 
@@ -846,16 +852,16 @@ class Feeds extends Handler_Protected {
 
                if ($_REQUEST["debug"]) $timing_info = print_checkpoint("0", $timing_info);
 
-               $feed = $this->dbh->escape_string($_REQUEST["feed"]);
-               $method = $this->dbh->escape_string($_REQUEST["m"]);
-               $view_mode = $this->dbh->escape_string($_REQUEST["view_mode"]);
+               $feed = db_escape_string($_REQUEST["feed"]);
+               $method = db_escape_string($_REQUEST["m"]);
+               $view_mode = db_escape_string($_REQUEST["view_mode"]);
                $limit = 30;
                @$cat_view = $_REQUEST["cat"] == "true";
-               @$next_unread_feed = $this->dbh->escape_string($_REQUEST["nuf"]);
-               @$offset = $this->dbh->escape_string($_REQUEST["skip"]);
-               @$vgroup_last_feed = $this->dbh->escape_string($_REQUEST["vgrlf"]);
-               $order_by = $this->dbh->escape_string($_REQUEST["order_by"]);
-               $check_first_id = $this->dbh->escape_string($_REQUEST["fid"]);
+               @$next_unread_feed = db_escape_string($_REQUEST["nuf"]);
+               @$offset = db_escape_string($_REQUEST["skip"]);
+               @$vgroup_last_feed = db_escape_string($_REQUEST["vgrlf"]);
+               $order_by = db_escape_string($_REQUEST["order_by"]);
+               $check_first_id = db_escape_string($_REQUEST["fid"]);
 
                if (is_numeric($feed)) $feed = (int) $feed;
 
@@ -867,21 +873,30 @@ class Feeds extends Handler_Protected {
                        return;
                }
 
-               $result = false;
-
+               $sth = false;
                if ($feed < LABEL_BASE_INDEX) {
+
                        $label_feed = Labels::feed_to_label_id($feed);
-                       $result = $this->dbh->query("SELECT id FROM ttrss_labels2 WHERE
-                                                       id = '$label_feed' AND owner_uid = " . $_SESSION['uid']);
+
+                       $sth = $this->pdo->prepare("SELECT id FROM ttrss_labels2 WHERE
+                                                       id = ? AND owner_uid = ?");
+                       $sth->execute([$label_feed, $_SESSION['uid']]);
+
                } else if (!$cat_view && is_numeric($feed) && $feed > 0) {
-                       $result = $this->dbh->query("SELECT id FROM ttrss_feeds WHERE
-                                                       id = '$feed' AND owner_uid = " . $_SESSION['uid']);
+
+                       $sth = $this->pdo->prepare("SELECT id FROM ttrss_feeds WHERE
+                                                       id = ? AND owner_uid = ?");
+                       $sth->execute([$feed, $_SESSION['uid']]);
+
                } else if ($cat_view && is_numeric($feed) && $feed > 0) {
-                       $result = $this->dbh->query("SELECT id FROM ttrss_feed_categories WHERE
-                                                       id = '$feed' AND owner_uid = " . $_SESSION['uid']);
+
+                       $sth = $this->pdo->prepare("SELECT id FROM ttrss_feed_categories WHERE
+                                                       id = ? AND owner_uid = ?");
+
+                       $sth->execute([$feed, $_SESSION['uid']]);
                }
 
-               if ($result && $this->dbh->num_rows($result) == 0) {
+               if ($sth && !$sth->fetch()) {
                        print json_encode($this->generate_error_feed(__("Feed not found.")));
                        return;
                }
@@ -898,14 +913,16 @@ class Feeds extends Handler_Protected {
 
                /* bump login timestamp if needed */
                if (time() - $_SESSION["last_login_update"] > 3600) {
-                       $this->dbh->query("UPDATE ttrss_users SET last_login = NOW() WHERE id = " .
-                               $_SESSION["uid"]);
+                       $sth = $this->pdo->prepare("UPDATE ttrss_users SET last_login = NOW() WHERE id = ?");
+                       $sth->execute([$_SESSION['uid']]);
+
                        $_SESSION["last_login_update"] = time();
                }
 
                if (!$cat_view && is_numeric($feed) && $feed > 0) {
-                       $this->dbh->query("UPDATE ttrss_feeds SET last_viewed = NOW()
-                                                       WHERE id = '$feed' AND owner_uid = ".$_SESSION["uid"]);
+                       $sth = $this->pdo->prepare("UPDATE ttrss_feeds SET last_viewed = NOW()
+                                                       WHERE id = ? AND owner_uid = ?");
+                       $sth->execute([$feed, $_SESSION['uid']]);
                }
 
                $reply['headlines'] = array();
@@ -915,7 +932,7 @@ class Feeds extends Handler_Protected {
 
                switch ($order_by) {
                case "title":
-                       $override_order = "ttrss_entries.title";
+                       $override_order = "ttrss_entries.title, date_entered, updated";
                        break;
                case "date_reverse":
                        $override_order = "score DESC, date_entered, updated";
@@ -976,18 +993,21 @@ class Feeds extends Handler_Protected {
 
                $reply['headlines']['content'] .= "<p><span class=\"insensitive\">";
 
-               $result = $this->dbh->query("SELECT ".SUBSTRING_FOR_DATE."(MAX(last_updated), 1, 19) AS last_updated FROM ttrss_feeds
-                       WHERE owner_uid = " . $_SESSION['uid']);
+               $sth = $this->pdo->prepare("SELECT ".SUBSTRING_FOR_DATE."(MAX(last_updated), 1, 19) AS last_updated FROM ttrss_feeds
+                       WHERE owner_uid = ?");
+               $sth->execute([$_SESSION['uid']]);
+               $row = $sth->fetch();
 
-               $last_updated = $this->dbh->fetch_result($result, 0, "last_updated");
-               $last_updated = make_local_datetime($last_updated, false);
+               $last_updated = make_local_datetime($row["last_updated"], false);
 
                $reply['headlines']['content'] .= sprintf(__("Feeds last updated at %s"), $last_updated);
 
-               $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']]);
+               $row = $sth->fetch();
 
-               $num_errors = $this->dbh->fetch_result($result, 0, "num_errors");
+               $num_errors = $row["num_errors"];
 
                if ($num_errors > 0) {
                        $reply['headlines']['content'] .= "<br/>";
@@ -1104,7 +1124,7 @@ class Feeds extends Handler_Protected {
        function feedBrowser() {
                if (defined('_DISABLE_FEED_BROWSER') && _DISABLE_FEED_BROWSER) return;
 
-               $browser_search = $this->dbh->escape_string($_REQUEST["search"]);
+               $browser_search = db_escape_string($_REQUEST["search"]);
 
                print_hidden("op", "rpc");
                print_hidden("method", "updateFeedBrowser");
@@ -1150,7 +1170,7 @@ class Feeds extends Handler_Protected {
        }
 
        function search() {
-               $this->params = explode(":", $this->dbh->escape_string($_REQUEST["param"]), 2);
+               $this->params = explode(":", db_escape_string($_REQUEST["param"]), 2);
 
                $active_feed_id = sprintf("%d", $this->params[0]);
                $is_cat = $this->params[1] != "false";
@@ -1237,9 +1257,10 @@ class Feeds extends Handler_Protected {
 
                if (!$owner_uid) $owner_uid = $_SESSION['uid'];
 
+               $pdo = Db::pdo();
+
                // Todo: all this interval stuff needs some generic generator function
 
-               $date_qpart = "false";
                $search_qpart = is_array($search) && $search[0] ? search_to_sql($search[0], $search[1])[0] : 'true';
 
                switch ($mode) {
@@ -1284,50 +1305,55 @@ class Feeds extends Handler_Protected {
                                                $cat_qpart = "cat_id IS NULL";
                                        }
 
-                                       db_query("UPDATE ttrss_user_entries
+                                       $sth = $pdo->prepare("UPDATE ttrss_user_entries
                                                SET unread = false, last_read = NOW() WHERE ref_id IN
                                                        (SELECT id FROM
                                                                (SELECT DISTINCT id FROM ttrss_entries, ttrss_user_entries WHERE ref_id = id
-                                                                       AND owner_uid = $owner_uid AND unread = true AND feed_id IN
+                                                                       AND owner_uid = ? AND unread = true AND feed_id IN
                                                                                (SELECT id FROM ttrss_feeds WHERE $cat_qpart) AND $date_qpart AND $search_qpart) as tmp)");
+                                       $sth->execute([$owner_uid]);
 
                                } else if ($feed == -2) {
 
-                                       db_query("UPDATE ttrss_user_entries
+                                       $sth = $pdo->prepare("UPDATE ttrss_user_entries
                                                SET unread = false,last_read = NOW() WHERE (SELECT COUNT(*)
                                                        FROM ttrss_user_labels2, ttrss_entries WHERE article_id = ref_id AND id = ref_id AND $date_qpart AND $search_qpart) > 0
-                                                       AND unread = true AND owner_uid = $owner_uid");
+                                                       AND unread = true AND owner_uid = ?");
+                                       $sth->execute([$owner_uid]);
                                }
 
                        } else if ($feed > 0) {
 
-                               db_query("UPDATE ttrss_user_entries
+                               $sth = $pdo->prepare("UPDATE ttrss_user_entries
                                        SET unread = false, last_read = NOW() WHERE ref_id IN
                                                (SELECT id FROM
                                                        (SELECT DISTINCT id FROM ttrss_entries, ttrss_user_entries WHERE ref_id = id
-                                                               AND owner_uid = $owner_uid AND unread = true AND feed_id = $feed AND $date_qpart AND $search_qpart) as tmp)");
+                                                               AND owner_uid = ? AND unread = true AND feed_id = ? AND $date_qpart AND $search_qpart) as tmp)");
+                               $sth->execute([$owner_uid, $feed]);
 
                        } else if ($feed < 0 && $feed > LABEL_BASE_INDEX) { // special, like starred
 
                                if ($feed == -1) {
-                                       db_query("UPDATE ttrss_user_entries
+                                       $sth = $pdo->prepare("UPDATE ttrss_user_entries
                                                SET unread = false, last_read = NOW() WHERE ref_id IN
                                                        (SELECT id FROM
                                                                (SELECT DISTINCT id FROM ttrss_entries, ttrss_user_entries WHERE ref_id = id
-                                                                       AND owner_uid = $owner_uid AND unread = true AND marked = true AND $date_qpart AND $search_qpart) as tmp)");
+                                                                       AND owner_uid = ? AND unread = true AND marked = true AND $date_qpart AND $search_qpart) as tmp)");
+                                       $sth->execute([$owner_uid]);
                                }
 
                                if ($feed == -2) {
-                                       db_query("UPDATE ttrss_user_entries
+                                       $sth = $pdo->prepare("UPDATE ttrss_user_entries
                                                SET unread = false, last_read = NOW() WHERE ref_id IN
                                                        (SELECT id FROM
                                                                (SELECT DISTINCT id FROM ttrss_entries, ttrss_user_entries WHERE ref_id = id
-                                                                       AND owner_uid = $owner_uid AND unread = true AND published = true AND $date_qpart AND $search_qpart) as tmp)");
+                                                                       AND owner_uid = ? AND unread = true AND published = true AND $date_qpart AND $search_qpart) as tmp)");
+                                       $sth->execute([$owner_uid]);
                                }
 
                                if ($feed == -3) {
 
-                                       $intl = get_pref("FRESH_ARTICLE_MAX_AGE");
+                                       $intl = (int) get_pref("FRESH_ARTICLE_MAX_AGE");
 
                                        if (DB_TYPE == "pgsql") {
                                                $match_part = "date_entered > NOW() - INTERVAL '$intl hour' ";
@@ -1336,43 +1362,47 @@ class Feeds extends Handler_Protected {
                                                        INTERVAL $intl HOUR) ";
                                        }
 
-                                       db_query("UPDATE ttrss_user_entries
+                                       $sth = $pdo->prepare("UPDATE ttrss_user_entries
                                                SET unread = false, last_read = NOW() WHERE ref_id IN
                                                        (SELECT id FROM
                                                                (SELECT DISTINCT id FROM ttrss_entries, ttrss_user_entries WHERE ref_id = id
-                                                                       AND owner_uid = $owner_uid AND score >= 0 AND unread = true AND $date_qpart AND $match_part AND $search_qpart) as tmp)");
+                                                                       AND owner_uid = ? AND score >= 0 AND unread = true AND $date_qpart AND $match_part AND $search_qpart) as tmp)");
+                                       $sth->execute([$owner_uid]);
                                }
 
                                if ($feed == -4) {
-                                       db_query("UPDATE ttrss_user_entries
+                                       $sth = $pdo->prepare("UPDATE ttrss_user_entries
                                                SET unread = false, last_read = NOW() WHERE ref_id IN
                                                        (SELECT id FROM
                                                                (SELECT DISTINCT id FROM ttrss_entries, ttrss_user_entries WHERE ref_id = id
-                                                                       AND owner_uid = $owner_uid AND unread = true AND $date_qpart AND $search_qpart) as tmp)");
+                                                                       AND owner_uid = ? AND unread = true AND $date_qpart AND $search_qpart) as tmp)");
+                                       $sth->execute([$owner_uid]);
                                }
 
                        } else if ($feed < LABEL_BASE_INDEX) { // label
 
                                $label_id = Labels::feed_to_label_id($feed);
 
-                               db_query("UPDATE ttrss_user_entries
+                               $sth = $pdo->prepare("UPDATE ttrss_user_entries
                                        SET unread = false, last_read = NOW() WHERE ref_id IN
                                                (SELECT id FROM
                                                        (SELECT DISTINCT ttrss_entries.id FROM ttrss_entries, ttrss_user_entries, ttrss_user_labels2 WHERE ref_id = id
-                                                               AND label_id = '$label_id' AND ref_id = article_id
-                                                               AND owner_uid = $owner_uid AND unread = true AND $date_qpart AND $search_qpart) as tmp)");
+                                                               AND label_id = ? AND ref_id = article_id
+                                                               AND owner_uid = ? AND unread = true AND $date_qpart AND $search_qpart) as tmp)");
+                               $sth->execute([$label_id, $owner_uid]);
 
                        }
 
                        CCache::update($feed, $owner_uid, $cat_view);
 
                } else { // tag
-                       db_query("UPDATE ttrss_user_entries
+                       $sth = $pdo->prepare("UPDATE ttrss_user_entries
                                SET unread = false, last_read = NOW() WHERE ref_id IN
                                        (SELECT id FROM
                                                (SELECT DISTINCT ttrss_entries.id FROM ttrss_entries, ttrss_user_entries, ttrss_tags WHERE ref_id = ttrss_entries.id
-                                                       AND post_int_id = int_id AND tag_name = '$feed'
-                                                       AND ttrss_user_entries.owner_uid = $owner_uid AND unread = true AND $date_qpart AND $search_qpart) as tmp)");
+                                                       AND post_int_id = int_id AND tag_name = ?
+                                                       AND ttrss_user_entries.owner_uid = ? AND unread = true AND $date_qpart AND $search_qpart) as tmp)");
+                       $sth->execute([$feed, $owner_uid]);
 
                }
        }
@@ -1383,6 +1413,8 @@ class Feeds extends Handler_Protected {
                $n_feed = (int) $feed;
                $need_entries = false;
 
+               $pdo = Db::pdo();
+
                if (!$owner_uid) $owner_uid = $_SESSION["uid"];
 
                if ($unread_only) {
@@ -1391,19 +1423,23 @@ class Feeds extends Handler_Protected {
                        $unread_qpart = "true";
                }
 
+               $match_part = "";
+
                if ($is_cat) {
                        return Feeds::getCategoryUnread($n_feed, $owner_uid);
                } else if ($n_feed == -6) {
                        return 0;
                } else if ($feed != "0" && $n_feed == 0) {
 
-                       $feed = db_escape_string($feed);
-
-                       $result = db_query("SELECT SUM((SELECT COUNT(int_id)
+                       $sth = $pdo->prepare("SELECT SUM((SELECT COUNT(int_id)
                                FROM ttrss_user_entries,ttrss_entries WHERE int_id = post_int_id
                                        AND ref_id = id AND $unread_qpart)) AS count FROM ttrss_tags
-                               WHERE owner_uid = $owner_uid AND tag_name = '$feed'");
-                       return db_fetch_result($result, 0, "count");
+                               WHERE owner_uid = ? AND tag_name = ?");
+
+                       $sth->execute([$owner_uid, $feed]);
+                       $row = $sth->fetch();
+
+                       return $row["count"];
 
                } else if ($n_feed == -1) {
                        $match_part = "marked = true";
@@ -1412,7 +1448,7 @@ class Feeds extends Handler_Protected {
                } else if ($n_feed == -3) {
                        $match_part = "unread = true AND score >= 0";
 
-                       $intl = get_pref("FRESH_ARTICLE_MAX_AGE", $owner_uid);
+                       $intl = (int) get_pref("FRESH_ARTICLE_MAX_AGE", $owner_uid);
 
                        if (DB_TYPE == "pgsql") {
                                $match_part .= " AND date_entered > NOW() - INTERVAL '$intl hour' ";
@@ -1437,7 +1473,6 @@ class Feeds extends Handler_Protected {
                        $label_id = Labels::feed_to_label_id($feed);
 
                        return Feeds::getLabelUnread($label_id, $owner_uid);
-
                }
 
                if ($match_part) {
@@ -1450,25 +1485,26 @@ class Feeds extends Handler_Protected {
                                $from_where = "";
                        }
 
-                       $query = "SELECT count(int_id) AS unread
+                       $sth = $pdo->prepare("SELECT count(int_id) AS unread
                                FROM $from_qpart WHERE
-                               $unread_qpart AND $from_where ($match_part) AND ttrss_user_entries.owner_uid = $owner_uid";
+                               $unread_qpart AND $from_where ($match_part) AND ttrss_user_entries.owner_uid = ?");
+                       $sth->execute([$owner_uid]);
+                       $row = $sth->fetch();
 
-                       //echo "[$feed/$query]\n";
-
-                       $result = db_query($query);
+                       return $row["unread"];
 
                } else {
 
-                       $result = db_query("SELECT COUNT(post_int_id) AS unread
+                       $sth = $pdo->prepare("SELECT COUNT(post_int_id) AS unread
                                FROM ttrss_tags,ttrss_user_entries,ttrss_entries
-                               WHERE tag_name = '$feed' AND post_int_id = int_id AND ref_id = ttrss_entries.id
-                               AND $unread_qpart AND ttrss_tags.owner_uid = " . $owner_uid);
-               }
+                               WHERE tag_name = ? AND post_int_id = int_id AND ref_id = ttrss_entries.id
+                               AND $unread_qpart AND ttrss_tags.owner_uid = ,");
 
-               $unread = db_fetch_result($result, 0, "unread");
+                       $sth->execute([$feed, $owner_uid]);
+                       $row = $sth->fetch();
 
-               return $unread;
+                       return $row["unread"];
+               }
        }
 
        /**
@@ -1490,6 +1526,8 @@ class Feeds extends Handler_Protected {
                global $fetch_last_error;
                global $fetch_last_error_content;
 
+               $pdo = Db::pdo();
+
                $url = fix_url($url);
 
                if (!$url || !validate_feed_url($url)) return array("code" => 2);
@@ -1526,32 +1564,35 @@ class Feeds extends Handler_Protected {
                        $cat_qpart = "'$cat_id'";
                }
 
-               $result = db_query(
-                       "SELECT id FROM ttrss_feeds
-                       WHERE feed_url = '$url' AND owner_uid = ".$_SESSION["uid"]);
+               if (!(int)$cat_id) $cat_id = null;
 
-               $auth_pass = db_escape_string($auth_pass);
+               $sth = $pdo->prepare("SELECT id FROM ttrss_feeds
+                       WHERE feed_url = ? AND owner_uid = ?");
+               $sth->execute([$url, $_SESSION['uid']]);
 
-               if (db_num_rows($result) == 0) {
-                       $result = db_query(
+               if ($row = $sth->fetch()) {
+                       return array("code" => 0, "feed_id" => (int) $row["id"]);
+               } else {
+                       $sth = $pdo->prepare(
                                "INSERT INTO ttrss_feeds
                                        (owner_uid,feed_url,title,cat_id, auth_login,auth_pass,update_method,auth_pass_encrypted)
-                               VALUES ('".$_SESSION["uid"]."', '$url',
-                               '[Unknown]', $cat_qpart, '$auth_login', '$auth_pass', 0, false)");
+                               VALUES (?, ?, ?, ?, ?, ?, 0, false)");
+
+                       $sth->execute([$_SESSION['uid'], $url, "[Unknown]", $cat_id, $auth_login, $auth_pass]);
 
-                       $result = db_query(
-                               "SELECT id FROM ttrss_feeds WHERE feed_url = '$url'
-                                       AND owner_uid = " . $_SESSION["uid"]);
+                       $sth = $pdo->prepare("SELECT id FROM ttrss_feeds WHERE feed_url = ?
+                                       AND owner_uid = ?");
+                       $sth->execute([$url, $_SESSION['uid']]);
+                       $row = $sth->fetch();
 
-                       $feed_id = db_fetch_result($result, 0, "id");
+                       $feed_id = $row["id"];
 
                        if ($feed_id) {
                                RSSUtils::set_basic_feed_info($feed_id);
                        }
 
                        return array("code" => 1, "feed_id" => (int) $feed_id);
-               } else {
-                       return array("code" => 0, "feed_id" => (int) db_fetch_result($result, 0, "id"));
+
                }
        }
 
@@ -1589,6 +1630,8 @@ class Feeds extends Handler_Protected {
        }
 
        static function getFeedTitle($id, $cat = false) {
+           $pdo = Db::pdo();
+
                if ($cat) {
                        return Feeds::getCategoryTitle($id);
                } else if ($id == -1) {
@@ -1604,21 +1647,29 @@ class Feeds extends Handler_Protected {
                } else if ($id == -6) {
                        return __("Recently read");
                } else if ($id < LABEL_BASE_INDEX) {
+
                        $label_id = Labels::feed_to_label_id($id);
-                       $result = db_query("SELECT caption FROM ttrss_labels2 WHERE id = '$label_id'");
-                       if (db_num_rows($result) == 1) {
-                               return db_fetch_result($result, 0, "caption");
+
+                       $sth = $pdo->prepare("SELECT caption FROM ttrss_labels2 WHERE id = ?");
+                       $sth->execute([$label_id]);
+
+                       if ($row = $sth->fetch()) {
+                               return $row["caption"];
                        } else {
                                return "Unknown label ($label_id)";
                        }
 
                } else if (is_numeric($id) && $id > 0) {
-                       $result = db_query("SELECT title FROM ttrss_feeds WHERE id = '$id'");
-                       if (db_num_rows($result) == 1) {
-                               return db_fetch_result($result, 0, "title");
+
+                   $sth = $pdo->prepare("SELECT title FROM ttrss_feeds WHERE id = ?");
+                   $sth->execute([$id]);
+
+                   if ($row = $sth->fetch()) {
+                               return $row["title"];
                        } else {
                                return "Unknown feed ($id)";
                        }
+
                } else {
                        return $id;
                }
@@ -1628,19 +1679,20 @@ class Feeds extends Handler_Protected {
 
                if (!$owner_uid) $owner_uid = $_SESSION["uid"];
 
+               $pdo = Db::pdo();
+
                if ($cat >= 0) {
 
-                       if ($cat != 0) {
-                               $cat_query = "cat_id = '$cat'";
-                       } else {
-                               $cat_query = "cat_id IS NULL";
-                       }
+                   if (!$cat) $cat = null;
+
+                       $sth = $pdo->prepare("SELECT id FROM ttrss_feeds
+                    WHERE (cat_id = :cat OR (:cat IS NULL AND cat_id IS NULL))
+                                       AND owner_uid = ?");
 
-                       $result = db_query("SELECT id FROM ttrss_feeds WHERE $cat_query
-                                       AND owner_uid = " . $owner_uid);
+                       $sth->execute([":cat" => $cat, ":uid" => $owner_uid]);
 
                        $cat_feeds = array();
-                       while ($line = db_fetch_assoc($result)) {
+                       while ($line = $sth->fetch()) {
                                array_push($cat_feeds, "feed_id = " . $line["id"]);
                        }
 
@@ -1648,15 +1700,16 @@ class Feeds extends Handler_Protected {
 
                        $match_part = implode(" OR ", $cat_feeds);
 
-                       $result = db_query("SELECT COUNT(int_id) AS unread
+                       $sth = $pdo->prepare("SELECT COUNT(int_id) AS unread
                                FROM ttrss_user_entries
                                WHERE   unread = true AND ($match_part)
-                               AND owner_uid = " . $owner_uid);
+                               AND owner_uid = ?");
+                       $sth->execute([$owner_uid]);
 
                        $unread = 0;
 
                        # this needs to be rewritten
-                       while ($line = db_fetch_assoc($result)) {
+                       while ($line = $sth->fetch()) {
                                $unread += $line["unread"];
                        }
 
@@ -1665,16 +1718,14 @@ class Feeds extends Handler_Protected {
                        return getFeedUnread(-1) + getFeedUnread(-2) + getFeedUnread(-3) + getFeedUnread(0);
                } else if ($cat == -2) {
 
-                       $result = db_query("
-                               SELECT COUNT(unread) AS unread FROM
+                       $sth = $pdo->prepare("SELECT COUNT(unread) AS unread FROM
                                        ttrss_user_entries, ttrss_user_labels2
                                WHERE article_id = ref_id AND unread = true
-                                       AND ttrss_user_entries.owner_uid = '$owner_uid'");
-
-                       $unread = db_fetch_result($result, 0, "unread");
-
-                       return $unread;
+                                       AND ttrss_user_entries.owner_uid = ?");
+                       $sth->execute([$owner_uid]);
+            $row = $sth->fetch();
 
+                       return $row["unread"];
                }
        }
 
@@ -1682,12 +1733,15 @@ class Feeds extends Handler_Protected {
        static function getCategoryChildrenUnread($cat, $owner_uid = false) {
                if (!$owner_uid) $owner_uid = $_SESSION["uid"];
 
-               $result = db_query("SELECT id FROM ttrss_feed_categories WHERE parent_cat = '$cat'
-                               AND owner_uid = $owner_uid");
+               $pdo = Db::pdo();
+
+               $sth = $pdo->prepare("SELECT id FROM ttrss_feed_categories WHERE parent_cat = ?
+                               AND owner_uid = ?");
+               $sth->execute([$cat, $owner_uid]);
 
                $unread = 0;
 
-               while ($line = db_fetch_assoc($result)) {
+               while ($line = $sth->fetch()) {
                        $unread += Feeds::getCategoryUnread($line["id"], $owner_uid);
                        $unread += Feeds::getCategoryChildrenUnread($line["id"], $owner_uid);
                }
@@ -1697,16 +1751,16 @@ class Feeds extends Handler_Protected {
 
        static function getGlobalUnread($user_id = false) {
 
-               if (!$user_id) {
-                       $user_id = $_SESSION["uid"];
-               }
+               if (!$user_id) $user_id = $_SESSION["uid"];
 
-               $result = db_query("SELECT SUM(value) AS c_id FROM ttrss_counters_cache
-                       WHERE owner_uid = '$user_id' AND feed_id > 0");
+               $pdo = Db::pdo();
 
-               $c_id = db_fetch_result($result, 0, "c_id");
+               $sth = $pdo->prepare("SELECT SUM(value) AS c_id FROM ttrss_counters_cache
+                       WHERE owner_uid = ? AND feed_id > 0");
+               $sth->execute([$user_id]);
+               $row = $sth->fetch();
 
-               return $c_id;
+               return $row["c_id"];
        }
 
        static function getCategoryTitle($cat_id) {
@@ -1717,11 +1771,14 @@ class Feeds extends Handler_Protected {
                        return __("Labels");
                } else {
 
-                       $result = db_query("SELECT title FROM ttrss_feed_categories WHERE
-                               id = '$cat_id'");
+                   $pdo = Db::pdo();
+
+                       $sth = $pdo->prepare("SELECT title FROM ttrss_feed_categories WHERE
+                               id = ?");
+                       $sth->execute([$cat_id]);
 
-                       if (db_num_rows($result) == 1) {
-                               return db_fetch_result($result, 0, "title");
+                       if ($row = $sth->fetch()) {
+                               return $row["title"];
                        } else {
                                return __("Uncategorized");
                        }
@@ -1731,11 +1788,15 @@ class Feeds extends Handler_Protected {
        static function getLabelUnread($label_id, $owner_uid = false) {
                if (!$owner_uid) $owner_uid = $_SESSION["uid"];
 
-               $result = db_query("SELECT COUNT(ref_id) AS unread FROM ttrss_user_entries, ttrss_user_labels2
-                       WHERE owner_uid = '$owner_uid' AND unread = true AND label_id = '$label_id' AND article_id = ref_id");
+               $pdo = Db::pdo();
+
+               $sth = $pdo->prepare("SELECT COUNT(ref_id) AS unread FROM ttrss_user_entries, ttrss_user_labels2
+                       WHERE owner_uid = ? AND unread = true AND label_id = ? AND article_id = ref_id");
 
-               if (db_num_rows($result) != 0) {
-                       return db_fetch_result($result, 0, "unread");
+               $sth->execute([$owner_uid, $label_id]);
+
+               if ($row = $sth->fetch()) {
+                       return $row["unread"];
                } else {
                        return 0;
                }
@@ -1743,6 +1804,11 @@ class Feeds extends Handler_Protected {
 
        static function queryFeedHeadlines($params) {
 
+               $pdo = Db::pdo();
+
+               // WARNING: due to highly dynamic nature of this query its going to quote parameters
+        // right before adding them to SQL part
+
                $feed = $params["feed"];
                $limit = isset($params["limit"]) ? $params["limit"] : 30;
                $view_mode = $params["view_mode"];
@@ -1762,7 +1828,7 @@ class Feeds extends Handler_Protected {
                $skip_first_id_check = isset($params["skip_first_id_check"]) ? $params["skip_first_id_check"] : false;
 
                $ext_tables_part = "";
-               $query_strategy_part = "";
+               $limit_query_part = "";
 
                $search_words = array();
 
@@ -1955,8 +2021,6 @@ class Feeds extends Handler_Protected {
                        $vfeed_query_part = $override_vfeed;
                }
 
-               $feed_title = "";
-
                if ($search) {
                        $feed_title = T_sprintf("Search results: %s", $search);
                } else {
@@ -1964,20 +2028,21 @@ class Feeds extends Handler_Protected {
                                $feed_title = Feeds::getCategoryTitle($feed);
                        } else {
                                if (is_numeric($feed) && $feed > 0) {
-                                       $result = db_query("SELECT title,site_url,last_error,last_updated
-                                                       FROM ttrss_feeds WHERE id = '$feed' AND owner_uid = $owner_uid");
-
-                                       $feed_title = db_fetch_result($result, 0, "title");
-                                       $feed_site_url = db_fetch_result($result, 0, "site_url");
-                                       $last_error = db_fetch_result($result, 0, "last_error");
-                                       $last_updated = db_fetch_result($result, 0, "last_updated");
+                                       $ssth = $pdo->prepare("SELECT title,site_url,last_error,last_updated
+                                                       FROM ttrss_feeds WHERE id = ? AND owner_uid = ?");
+                                       $ssth->execute([$feed, $owner_uid]);
+                    $row = $ssth->fetch();
+
+                                       $feed_title = $row["title"];
+                                       $feed_site_url = $row["site_url"];
+                                       $last_error = $row["last_error"];
+                                       $last_updated = $row["last_updated"];
                                } else {
                                        $feed_title = Feeds::getFeedTitle($feed);
                                }
                        }
                }
 
-
                $content_query_part = "content, ";
 
                if ($limit_query_part) {
@@ -2057,6 +2122,7 @@ class Feeds extends Handler_Protected {
                                }
 
                                $result = db_query($query);
+
                                if ($result && db_num_rows($result) > 0) {
                                        $first_id = (int)db_fetch_result($result, 0, "id");