Online PHP editor | output for K86jv

<?php $checkDateTimeUTC = ""; $D = '20130412'; $T = '110101'; if (($D > "") and ($T > "")) { //D=20130412&T=110101 $datum = gmdate("Y-m-d"); //YYYYMMDD UTC $tijd = gmdate("H:i:s"); //hhmmss UTC $time_string = substr($D, 0, 4) . "-" . substr($D, 4, 2) . "-" . substr($D, 6, 2) . " " . substr($T, 0, 2) . ":" . substr($T, 2, 2) . ":" . substr($T, 4, 2); echo $time_string; echo "\r\n"; echo $checkDateTimeUTC = gmdate('Y-m-d\TH:i:s\Z', strtotime($time_string)); } else { echo $checkDateTimeUTC = gmdate('Y-m-d\TH:i:s\Z'); } ?>