<?php
function deleteAll($directory, $empty = false) {
    if(substr($directory,-1) == "/") {
        $directory = substr($directory,0,-1);
    }

    if(!file_exists($directory) || !is_dir($directory)) {
        return false;
    } elseif(!is_readable($directory)) {
        return false;
    } else {
        $directoryHandle = opendir($directory);
       
        while ($contents = readdir($directoryHandle)) {
            if($contents != '.' && $contents != '..') {
                $path = $directory . "/" . $contents;
               
                if(is_dir($path)) {
                    deleteAll($path);
                } else {
                    unlink($path);
                }
            }
        }
       
        closedir($directoryHandle);

        if($empty == false) {
            if(!rmdir($directory)) {
                return false;
            }
        }
       
        return true;
    }
}
?>

http://php.net/manual/en/function.rmdir.php

This isn't my code, but just thought I would share, since it took me so long to find. This is a function to delete a folder, all sub-folders, and files in one clean move.

Just tell it what directory you want deleted, in relation to the page that this function is executed. Then set $empty = true if you want the folder just emptied, but not deleted. If you set $empty = false, or just simply leave it out, the given directory will be deleted, as well.

Delete All Files

PHP