How do I chown recursively?

I want to change the owner of a directory recursively using PHP. The chown function works only on a single file.

I know I can use the below command from the terminal:

sudo chown -R user /path/to/dir/

How do I achieve the same in PHP?

Answer

/**
 * Recursively chown a directory
 *
 * @param string     $dir
 * @param string|int $user
 */
function rchown($dir, $user)
{
    $dir = rtrim($dir, "/");
    if ($items = glob($dir . "/*")) {
        foreach ($items as $item) {
            if (is_dir($item)) {
                rchown($item, $user);
            } else {
                chown($item, $user);
            }
        }
    }

    chown($dir, $user);
}