3v4l.org

run code in 300+ PHP versions simultaneously
<?php $fn = (function() { $i = 0; return function() use(&$i) { return $i++; }; })(); $fn(); // 0 $fn(); // 1 $fn(); // 2
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 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
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
Parse error: syntax error, unexpected '(' in /in/MV8Nv on line 8
Process exited with code 255.
preferences:
167.72 ms | 402 KiB | 242 Q