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diff --git a/classes/logger/sql.php b/classes/logger/sql.php
old mode 100644
new mode 100755
index b0e0b0db..73552c14
--- a/classes/logger/sql.php
+++ b/classes/logger/sql.php
@@ -1,31 +1,26 @@
 <?php
 class Logger_SQL {
 
-	function log_error($errno, $errstr, $file, $line, $context) {
+	private $pdo;
 
-		if ($errno == E_NOTICE) return false;
+	function log_error($errno, $errstr, $file, $line, $context) {
 
-		if (Db::get()) {
+		// separate PDO connection object is used for logging
+		if (!$this->pdo) $this->pdo = Db::instance()->pdo_connect();
 
-			$errno = Db::get()->escape_string($errno);
-			$errstr = Db::get()->escape_string($errstr);
-			$file = Db::get()->escape_string($file);
-			$line = Db::get()->escape_string($line);
-			$context = ''; // backtrace is a lot of data which is not really critical to store
-			//$context = db_escape_string($this->link, serialize($context));
+		if ($this->pdo && get_schema_version() > 117) {
 
-			$owner_uid = $_SESSION["uid"] ? $_SESSION["uid"] : "NULL";
+			$owner_uid = $_SESSION["uid"] ? $_SESSION["uid"] : null;
 
-			$result = Db::get()->query(
-				"INSERT INTO ttrss_error_log
+			$sth = $this->pdo->prepare("INSERT INTO ttrss_error_log
 				(errno, errstr, filename, lineno, context, owner_uid, created_at) VALUES
-				($errno, '$errstr', '$file', '$line', '$context', $owner_uid, NOW())");
+				(?, ?, ?, ?, ?, ?, NOW())");
+			$sth->execute([$errno, $errstr, $file, $line, $context, $owner_uid]);
 
-			return Db::get()->affected_rows($result) != 0;
+			return $sth->rowCount();
 		}
 
 		return false;
 	}
 
 }
-?>