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<?php $a = strtotime("2016-10-1 15:50:00"); $b = strtotime("2016-10-1 18:15:00"); echo date("H:i:s",$b-$a); $c = $a + date("H:i:s",$b-$a); echo date("H:i:s",$c); ?>
Output for git.master, git.master_jit, rfc.property-hooks
03:25:00 Warning: A non-numeric value encountered in /in/iOciS on line 6 15:50:03

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