Do not call get_magic_quote_gpc() when running in PHP version >= 5.4.

This deprecated function has been removed in PHP 8.

Author: monnerat

lib/common.php

@@ -297,7 +297,9 @@ function stopwatch() {
  * Strip slashes from GET, POST, and COOKIE variables if this
  * PHP install is configured to automatically addslashes()
  */
-if (@get_magic_quotes_gpc() && (! isset($slashes_stripped) || ! $slashes_stripped)) {
+if (@version_compare(phpversion(), '5.4.0', '<') &&
+    @get_magic_quotes_gpc() &&
+    (!isset($slashes_stripped) || !$slashes_stripped)) {
 	array_stripslashes($_REQUEST);
 	array_stripslashes($_GET);
 	array_stripslashes($_POST);