3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array('foo' => 'bar'); $test = compact($arr); print var_dump($test);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: compact(): Undefined variable $bar in /in/eMJRG on line 4 array(0) { }
Output for 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: compact(): Undefined variable: bar in /in/eMJRG on line 4 array(0) { }
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 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.32 - 7.3.33
array(0) { }
preferences:
284.53 ms | 404 KiB | 460 Q