fix getMimeType

inc/toolbox.php

@@ -127,6 +127,7 @@ class ToolBox
 	
 	public static function getMimeType($sPath, $bSubTypeOnly=false)
 	{
+		$sMimetype = '';
 		//Retrieving file Content Type
 		if(file_exists($sPath)) //Local
 		{
@@ -152,7 +153,7 @@ class ToolBox
 		if($bSubTypeOnly)
 		{
 			preg_match('`\/(?P<type>\w+)(\;|$)`ui', mb_strtolower($sMimetype), $asMatch);
-			$sMimetype = $asMatch['type'];
+			if(array_key_exists('type', $asMatch)) $sMimetype = $asMatch['type'];
 		}
 		return $sMimetype;
 	}