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<?php $match = '/^edit_(.*?)_account$/iU'; $test = 'edit__account'; preg_match_all($match, $test, $res); var_dump($res);
Output for 4.3.0 - 7.1.0
array(2) { [0]=> array(1) { [0]=> string(13) "edit__account" } [1]=> array(1) { [0]=> string(0) "" } }