Index: branches/5.2.x/core/units/helpers/file_helper.php
===================================================================
diff -u -r16513 -r16687
--- branches/5.2.x/core/units/helpers/file_helper.php	(.../file_helper.php)	(revision 16513)
+++ branches/5.2.x/core/units/helpers/file_helper.php	(.../file_helper.php)	(revision 16687)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: file_helper.php 16513 2017-01-20 14:10:53Z alex $
+* @version	$Id: file_helper.php 16687 2021-03-16 08:28:30Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -481,4 +481,25 @@
 
 			return $new_name;
 		}
+
+		/**
+		 * Checks, that given file name has on of provided file extensions
+		 *
+		 * @param string $filename   Filename.
+		 * @param string $file_types File types.
+		 *
+		 * @return boolean
+		 */
+		public function extensionMatch($filename, $file_types)
+		{
+			if ( preg_match_all('/\*\.(.*?)(;|$)/', $file_types, $regs) ) {
+				$file_extension = mb_strtolower(pathinfo($filename, PATHINFO_EXTENSION));
+				$file_extensions = array_map('mb_strtolower', $regs[1]);
+
+				return in_array($file_extension, $file_extensions);
+			}
+
+			return true;
+		}
+
 	}