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<?php

/**
 * @link https://www.humhub.org/
 * @copyright Copyright (c) 2017 HumHub GmbH & Co. KG
 * @license https://www.humhub.com/licences
 */

namespace humhub\libs;

/**
 * StringHelper
 *
 * @since 1.1
 * @author luke
 */
class StringHelper extends \yii\helpers\StringHelper
{

    /**
     * Converts (LDAP) Binary to Ascii GUID
     *
     * @param string $object_guid a binary string containing data.
     * @return string the guid
     */
    public static function binaryToGuid($object_guid)
    {
        $hex_guid = bin2hex($object_guid);

        if ($hex_guid == '') {
            return '';
        }

        $hex_guid_to_guid_str = '';
        for ($k = 1; $k <= 4; ++$k) {
            $hex_guid_to_guid_str .= substr($hex_guid, 8 - 2 * $k, 2);
        }
        $hex_guid_to_guid_str .= '-';
        for ($k = 1; $k <= 2; ++$k) {
            $hex_guid_to_guid_str .= substr($hex_guid, 12 - 2 * $k, 2);
        }
        $hex_guid_to_guid_str .= '-';
        for ($k = 1; $k <= 2; ++$k) {
            $hex_guid_to_guid_str .= substr($hex_guid, 16 - 2 * $k, 2);
        }
        $hex_guid_to_guid_str .= '-' . substr($hex_guid, 16, 4);
        $hex_guid_to_guid_str .= '-' . substr($hex_guid, 20);

        return strtolower($hex_guid_to_guid_str);
    }
}

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