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<?php $re = '/(\bLAB_[0-9A-F]{2}\b)|(\bLAB_[0-9A-F]{4}\b)/'; $str = 'LAB_FF12'; preg_match($re, $str, $matches); var_dump($matches); $substitutes = ["", "DAB", "HAD"]; For($i=1; $i<count($matches); $i++){ If($matches[$i] != ""){ $result = $substitutes[$i] . substr($matches[$i],3); Break; } } Echo $result;
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { [0]=> string(8) "LAB_FF12" [1]=> string(0) "" [2]=> string(8) "LAB_FF12" } HAD_FF12

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