3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo date("M-d-Y-W", mktime(0, 0, 0, 01, 01, 2016)); echo " - "; echo strftime("%G", mktime(0, 0, 0, 01, 01, 2016));
preferences:
53.18 ms | 402 KiB | 5 Q