- var_dump: documentation ( source)
- preg_match: documentation ( source)
- str_replace: documentation ( source)
<?php
$key = "infoscom.ipad";
$pattern = '/(' . str_replace('.', '\.', $this->usrAgtPrefix) . '\.\w+);/i';
$ua = "Mozilla/5.0 (infoscom.iPad.1; U; CPU OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B334b Safari/531.21.10";
var_dump(preg_match($pattern, $ua, $reMatches), $reMatches);