- var_dump: documentation ( source)
- preg_match: documentation ( source)
<?php
$exp = '#^((http:|https:)?//(www\.)?arrivo\.ru|/[^/])(?!.*tury)(?!.*about)(?!.*advert)(?!.*vietnam)(?!.*indoneziya)(?!.*marokko)(?!.*seiyshelskie-ostrova)(?!.*oae)(?!.*angliya)(?!.*germaniya)(?!.*malta)(?!.*niderlandy)(?!.*shveiytsariya)(?!.*ssha)(?!.*barbados)(?!.*yamaiyka)(?!.*avstraliya).*$#';
var_dump(preg_match($exp, 'http://arrivo.ru/tury/ispaniya.html'));