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run code in 200+ php & hhvm versions
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<?php $str = "Mozilla/4.5 [en] (X11; U; Linux 2.2.9 i586)"; preg_match_all('/;/', $str, $matches); var_dump($matches);
Output for 4.3.0 - 7.1.10
array(1) { [0]=> array(2) { [0]=> string(1) ";" [1]=> string(1) ";" } }