3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 1; function test() { global $a; $b = 2; var_dump(compact('a', 'b')); } test();
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 - 5.6.28, 7.0.4 - 7.0.20, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(2) { ["a"]=> int(1) ["b"]=> int(2) }
Output for 7.0.0 - 7.0.3
array(2) { ["a"]=> &int(1) ["b"]=> int(2) }

preferences:
186.5 ms | 401 KiB | 355 Q