A simple function to delete a folder recursively. Very danger! Watch out!

PHP_delete_a_folder_recursively

<?php 
// A simple function to delete a folder recursively. Very danger! Watch out!
// PHP用遞迴把資料夾給砍掉，殺傷力強大，請謹慎使用。
// V1.1 use readdir() instead of glob() for better non-english file name support in php4
// source unknown, modified by Jason Chiang
// xcojad at gmail.com

$folder_name="PEAR";

$folder_name="upload";

function delTree($dir) {
if ($handle = opendir($dir)) {
    /* This is the correct way to loop over the directory. */
    while (false !== ($entry = readdir($handle))) {
        if ($entry != "." && $entry != ".."){
            if(is_dir("$dir/$entry")){
                delTree("$dir/$entry");
            }
            else {
                unlink("$dir/$entry");
                echo "Deleting File: $dir/$entry\n";
            }
            if(is_dir("$dir/$entry")){
                echo "Deleting Dir : $dir/$entry/\n";
                rmdir("$dir/$entry");
            }

        }

    }
    closedir($handle);
    echo "Deleting Dir : $dir/\n";
    rmdir("$dir");
}
}
delTree($folder_name);
?>