3v4l.org

run code in 300+ PHP versions simultaneously
$x = 'cat';$closure = function () use (&$x) { return $x == 'dog'; };var_dump($closure);$x = 'dog';var_dump($closure);<?php
Output for 7.4.3 - 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
$x = 'cat';$closure = function () use (&$x) { return $x == 'dog'; };var_dump($closure);$x = 'dog';var_dump($closure);
Output for 5.4.0 - 5.4.31, 5.5.0 - 5.5.15, 7.3.32 - 7.3.33
Parse error: syntax error, unexpected end of file in /in/cdaG5 on line 1
Process exited with code 255.
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, 7.2.29 - 7.2.33, 7.3.16 - 7.3.31
$x = 'cat';$closure = function () use (&$x) { return $x == 'dog'; };var_dump($closure);$x = 'dog';var_dump($closure);<?php

preferences:
174.17 ms | 403 KiB | 270 Q