i added the $fileType array

function dir2array($targetDir, &$fileType){
   $filesArray = array();
   if ($handle = opendir($targetDir)){
      while (false !== ($file = readdir($handle))){
         if(in_array(end(explode(".", $file)), $fileType)){
            $filesArray[] = $file;
            }
         }
         closedir($handle);
      }
   if (count($filesArray) > 0) {
      return $filesArray;
   } else {
      return FALSE;
      }
   }

// Usage Examples:

$arrayName = dir2array("path/to/directory", $arr = array("jpg", "png", "gif")); 
$randfile = $arrayName[array_rand($arrayName)];

if(FALSE !== ($arrayName = dir2array("path/to/directory", $arr = array("jpg", "png", "gif")))){ $randfile = $arrayName[array_rand($arrayName)]; }