3v4l.org

run code in 300+ PHP versions simultaneously
<?php function test () { for ($x=2013,$y=01,$z=01; $x<2038; $x++,$y++,$z++) { echo date("ymd") . ': ' . dechex(date("ymd")) . "\n"; } } echo test();

preferences:
65.98 ms | 402 KiB | 5 Q