reqursiveDirectoryDrop.php

<?php

function dropDirectory($path) {

    // drop included files and directories
    foreach(new \DirectoryIterator($path) as $file) {
        if($file->isDot()) {
            continue;
        }
        // drop dir
        if($file->isDir()) {
            dropDirectory($file->getPathname());
            rmdir($file->getPathname());
        // drop file
        } else {
            unlink($file->getPathname());
        }
    }

    // drop dir itself
    rmdir($file->getPathname());

}