Add recursive adding directory to standard PharData class

PharData_custome.php

<?php

namespace PharData;

class Custom extends \PharData {
    /**
     * Add directory and sub-file/directory
     *
     * @param string  $directory
     * @param ?string $excludingPath string what path in beginning must by ignore on adding to archive. If pass NULL - set as the parent directory of
     *                               copy directory
     *
     * @return void
     *
     * @throws \PharException
     */
    function addDirectoryRecursive(string $directory, ?string $excludingPath = null) : void {
        if ($excludingPath !== null && str_starts_with($directory, $excludingPath) === false) {
            throw new \PharException(message: "Directory path must be start with excluding path", code: 400);
        }
        if ($excludingPath === null) {
            $excludingPath = dirname($directory);
        }

        for ($handle = opendir($directory); false !== ($entry = readdir($handle));) {
            if ($entry == "." || $entry == "..") {
                continue;
            }

            $file = $directory . DIRECTORY_SEPARATOR . $entry;
            if (is_dir($file) === true) {
                $this->addDirectoryRecursive($file, $excludingPath ?? dirname($directory));
            } else {
                $this->addFile($file, str_replace($excludingPath, '', $file));
            }
        }
        closedir($handle);
    }
}