Delete directory using rmdir() in PHP even if the directory is not empty

function delete_directory( $dir ) {
    // Check if $dir is a directory.
    if ( ! is_dir( $dir ) ) {
        return false; // No need to continue if it's not a directory.
    }

    // Get all files and folders in the directory.
    $items = scandir( $dir );
    // Loop through items in the directory.
    foreach ( $items as $item ) {
        // Skip special entries "." (current directory) and ".." (parent directory)
        if ( $item == '.' || $item == '..' ) {
            continue;
        }
        // Build the full path of the current item.
        $path = $dir . DIRECTORY_SEPARATOR . $item;

        // If the item is a directory, call this function recursively.
        if ( is_dir( $path ) ) {
            delete_directory( $path );
        } else { // If the item is a file, delete it.
            unlink( $path );
        }
    }
    // Remove the main directory.
    return rmdir( $dir );
}