PHP 域名與子域名判斷

/**

 * nimo

 * 判斷域名是否在域名陣列裡面

 * @.表示域名本身，*.表示所有子域名

 * @param  string $domain      被判斷的域名

 * @param  array $domain_list  域名陣列

 * @param  string $match_sub_domain 符合域名的的字域名

 * @param  string $match_domain 符合域名的母域名

 * @return boolean             true(在)/false(不在)

 */

function in_domain($domain, $domain_list, &$match_sub_domain='', &$match_domain='') {

    foreach ($domain_list as $judge_domain) {

        if (preg_match("#^(?:\*\.)(.*)$#", $judge_domain, $match)) {

            $tmp_domain = str_replace(".","\.",$match[1]);

            if (preg_match("#^(.+)\.({$tmp_domain})$#", $domain, $match2)) {

                $match_sub_domain = $match2[1];

                $match_domain = $match2[2];

                return true;

            }

        } else if (preg_match("#^(?:\@\.)(.*)$#", $judge_domain, $match)) {

            $tmp_domain = str_replace(".","\.",$match[1]);

            if (preg_match("#^({$tmp_domain})$#", $domain, $match2)) {

                $match_sub_domain = '';

                $match_domain = $match2[1];

                return true;

            }

        } else if ($judge_domain == $domain) {

            $match_sub_domain = '';

            $match_domain = $domain;

            return true;

        }

    }

    return false;

}

這裡是一個域名轉跳用的範例

$tmp_domain = $_SERVER['HTTP_HOST'];

$to_https_array = array('@.test.com, '*.test.com');

if ($web_protocol == 'http' AND in_domain($tmp_domain, $to_https_array, $match_sub, $match_domain)) {



    // Example: *.test.com 包含其子域名轉到 *.test.com.tw

    if ($match_domain == 'test.com') {

        $redirect_domain = ($match_sub == '' ? 'test.com' : "{$match_sub}.test.com.tw");

        header("Location: http://{$redirect_domain}{$_SERVER['REQUEST_URI']}");

        die('redirect~~');

    }

}