It is rather dangerous to recurse into symbolically linked directories. The delTree should be modified to check for links.
<?php
public static function delTree($dir) {
$files = array_diff(scandir($dir), array('.','..'));
foreach ($files as $file) {
(is_dir("$dir/$file") && !is_link($dir)) ? delTree("$dir/$file") : unlink("$dir/$file");
}
return rmdir($dir);
}
?>