3v4l.org

run code in 300+ PHP versions simultaneously
<?php $var = 10; $f = function($let)use($var){ return ++$let + $var; }; $var = 15; echo $f(10);
Output for 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
21
preferences:
130.22 ms | 407 KiB | 5 Q