diff --git a/src/common.php b/src/common.php
index e066fee..78b26db 100644
--- a/src/common.php
+++ b/src/common.php
@@ -2,7 +2,7 @@
 
 /*
 	This file is part of myTinyTodo.
-	(C) Copyright 2009-2010 Max Pozdeev <maxpozdeev@gmail.com>
+	(C) Copyright 2009-2010,2020 Max Pozdeev <maxpozdeev@gmail.com>
 	Licensed under the GNU GPL v2 license. See file COPYRIGHT for details.
 */
 
@@ -32,14 +32,26 @@ function htmlarray_ref(&$a, $exclude=null)
 
 function stop_gpc(&$arr)
 {
-	if (!is_array($arr)) return 1;
+	if (!is_array($arr)) {
+		return 1;
+	}
+	
+	// Since PHP v5.4.0 magic quotes feature was removed from PHP
+	// In PHP v7.4 get_magic_quotes_gpc is deprecated
+	// TODO: do not use get_magic_quotes_gpc() and stop_gpc()
+	if (!@get_magic_quotes_gpc()) {
+		return 1;
+	}
 	
-	if (!get_magic_quotes_gpc()) return 1;
 	reset($arr);
-	foreach($arr as $k=>$v)
+	foreach ($arr as $k=>$v)
 	{
-		if(is_array($arr[$k])) stop_gpc($arr[$k]);
-		elseif(is_string($arr[$k])) $arr[$k] = stripslashes($v);
+		if (is_array($arr[$k])) {
+			stop_gpc($arr[$k]);
+		}
+		elseif (is_string($arr[$k])) {
+			$arr[$k] = stripslashes($v);
+		}
 	}
 
 	return 1;
diff --git a/src/init.php b/src/init.php
index 550f46a..98ded63 100644
--- a/src/init.php
+++ b/src/init.php
@@ -1,10 +1,15 @@
 <?php
 /*
 	This file is part of myTinyTodo.
-	(C) Copyright 2009-2010 Max Pozdeev <maxpozdeev@gmail.com>
+	(C) Copyright 2009-2010,2020 Max Pozdeev <maxpozdeev@gmail.com>
 	Licensed under the GNU GPL v2 license. See file COPYRIGHT for details.
 */
 
+##### MyTinyTodo requires php 5.4.0 and above! #####
+if (version_compare(PHP_VERSION, '5.4.0') < 0) {
+	die("PHP 5.4+ is required");
+}
+
 if(!defined('MTTPATH')) define('MTTPATH', dirname(__FILE__) .'/');
 
 require_once(MTTPATH. 'common.php');
@@ -46,7 +51,7 @@ else {
 $db->prefix = Config::get('prefix');
 
 //User can override language setting by cookies
-if(isset($_COOKIE['lang']) && preg_match("/^[a-z-]+$/i", $_COOKIE['lang']) && file_exists('lang/'. $_COOKIE['lang']. '.php')) {
+if(isset($_COOKIE['lang']) && preg_match("/^[a-z-]+$/i", $_COOKIE['lang']) && file_exists(MTTPATH. 'lang/'. $_COOKIE['lang']. '.php')) {
 	Config::set('lang', $_COOKIE['lang']);
 }