<?php $arr = ["00:00:00", "00:00:02", "00:00:30", "00:02:30", "00:20:00", "01:02:30", "10:20:03"]; foreach ($arr as $time) { preg_match('/([1-9].*|.{4}$)/', $time, $matches); echo $time." -> ".$matches[1]."\n"; }
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