<?php $char_set = 'a-z_'; $val = 'login_form'; var_dump(preg_quote($char_set, '/')); $sDomain_name = 'your-domain.com'; $db_domain_name = 'your-domain.com'; var_dump(preg_match('/(^|\.)'.preg_quote($sDomain_name).'($|:[0-9]+)/i', $db_domain_name));
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