3v4l.org

run code in 300+ PHP versions simultaneously
<?php $_POST["some_key"] = "some_value"; $m=['GET'=>$_GET,'POST'=>$_POST]; foreach($m as$k=>$v){ echo count($v)? $k.' was requested.':null; } ?>
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
POST was requested.
preferences:
111.03 ms | 408 KiB | 5 Q