3v4l.org

run code in 500+ PHP versions simultaneously
<?php function testNG($tng = '') { static $testNG = ''; return $testNG .= $tng; } testNG("hello!!"); testNG(" world!!"); testNG(" etc."); ?> <h2><?= testNG(); ?></h2>
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
<h2>hello!! world!! etc.</h2>
preferences:
106.65 ms | 1424 KiB | 4 Q