3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = exec("ping -n 1 -w 1 172.19.144.10", $input, $result); if ($result == 0){ echo "<img src=\"on.png\">"; }else{ echo "<img src=\"off.png\">"; } ?>
Output for 7.2.29 - 7.2.33, 7.3.16 - 7.3.33, 7.4.3 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: exec(): Unable to fork [ping -n 1 -w 1 172.19.144.10] in /in/X6eBA on line 2 <img src="off.png">
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.13, 7.3.0 - 7.3.12, 7.4.0
<img src="off.png">
preferences:
259.99 ms | 404 KiB | 424 Q