Cleanup files in a directory based on time

snippet.php

<?php
  $files = glob("*");
	$time  = time();
	$ignore = array('cleanup.php','.ftpquota','index.html','robots.txt');

	foreach($files as $file) {
		if(is_file($file) && !in_array($file,$ignore)) {
			if($time - filemtime($file) >= 60*60*24*30) { // 30 days
		    	unlink($file);
		    }
		}
	}