3v4l.org

run code in 300+ 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 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.13
<h2>hello!! world!! etc.</h2>
preferences:
95.51 ms | 407 KiB | 5 Q