The following code deletes images that contain the word "snapshot" and are older than one year. <?php $imagePattern = "/snapshot/i"; $directory = "./images"; if (($handle = opendir($directory)) != false) { while (($file = readdir($handle)) != false) { $filename = "$directory/$file"; //echo $filename." "; if ( filemtime($filename) <=strtotime("-1 year") && preg_match($imagePattern, $filename)) { unlink($filename); //$filetime=filemtime($filename); //echo $filename." ".date('l dS \o\f F Y h:i:s A', $filetime)." "; } } echo "Successfully deleted old images"; closedir($handle); } ?>