diff --git a/ChangeLog b/ChangeLog
index 62e4abaad..5fb4ec4a1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,6 +7,8 @@ $HeadURL: https://phpmyadmin.svn.sourceforge.net/svnroot/phpmyadmin/trunk/phpMyA
 
 2.11.6.0 (not yet released)
 - bug #1903724 [interface] Displaying of very large queries in error message 
+- bug #1905711 [compatibility] Functions deprecated in PHP 5.3: is_a() and
+  get_magic_quotes_gpc(), thanks to Dmitry N. Shilnikov - yrtimd
 
 2.11.5.0 (2008-03-01)
 - bug #1862661 [GUI] Warn about rename deleting database 
diff --git a/libraries/common.inc.php b/libraries/common.inc.php
index b5bec73bc..e944d2a7b 100644
--- a/libraries/common.inc.php
+++ b/libraries/common.inc.php
@@ -222,7 +222,8 @@ if (isset($_POST['usesubform'])) {
 // end check if a subform is submitted
 
 // remove quotes added by php
-if (function_exists('get_magic_quotes_gpc') && get_magic_quotes_gpc()) {
+// (@ before get_magic_quotes_gpc() because it's deprecated in PHP 5.3)
+if (function_exists('get_magic_quotes_gpc') && @get_magic_quotes_gpc()) {
     PMA_arrayWalkRecursive($_GET, 'stripslashes', true);
     PMA_arrayWalkRecursive($_POST, 'stripslashes', true);
     PMA_arrayWalkRecursive($_COOKIE, 'stripslashes', true);
diff --git a/libraries/dbi/mysqli.dbi.lib.php b/libraries/dbi/mysqli.dbi.lib.php
index a21d49606..3270ec666 100644
--- a/libraries/dbi/mysqli.dbi.lib.php
+++ b/libraries/dbi/mysqli.dbi.lib.php
@@ -326,15 +326,13 @@ function PMA_DBI_fetch_row($result)
  * @uses    mysqli_result
  * @uses    func_get_args()
  * @uses    is_object()
- * @uses    is_a()
  * @uses    mysqli_free_result()
  * @param   result  $result,...     one or more mysql result resources
  */
 function PMA_DBI_free_result()
 {
     foreach (func_get_args() as $result) {
-        if (is_object($result)
-          && is_a($result, 'mysqli_result')) {
+        if ($result instanceof mysqli_result) {
             mysqli_free_result($result);
         }
     }