Delete folder and contains with recursive way

delete-recursive.php

<?php

// target directory path
$target = __DIR__.'/./thumbs';

/**
 * Delete folder and contents recursively
 * 
 * @param string $target: target dir path
 * @return bool|null
 * 
 * Source: https://stackoverflow.com/a/3349792/6940144
 */
function deleteFolder($target){
    if (file_exists($target)){
        $it = new RecursiveDirectoryIterator($target, RecursiveDirectoryIterator::SKIP_DOTS);
        $files = new RecursiveIteratorIterator($it, RecursiveIteratorIterator::CHILD_FIRST);

        foreach($files as $file) {
            $file->isDir() ? rmdir($file->getRealPath()) : unlink($file->getRealPath());
        }

        return rmdir($target);
    }

    return null;
}

//example usage
$delete = deleteFolder($target);

if ($delete === null){
    echo 'Target directory not found';
} else if ($delete === false){
    echo 'Target directory not found or operation failed';
} else {
    echo 'Folder and contains deleted!';
}