Recurse dirr deletion

recurse-dirr-delete.php

private function delete_dir($dirPath)
{
    if (! is_dir($dirPath))
    {
        throw new InvalidArgumentException("$dirPath must be a directory");
    }
    if (substr($dirPath, strlen($dirPath) - 1, 1) != '/')
    {
        $dirPath .= '/';
    }
    $files = glob($dirPath . '*', GLOB_MARK);
    foreach ($files as $file)
    {
        if (is_dir($file))
        {
            $this->deleteDir($file);
        }
        else
        {
            unlink($file);
        }
    }
    rmdir($dirPath);
}