3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array(0=>1,1=>2); $check = true; unset($arr[0], $check); print_r($arr, $check);
Output for 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Undefined variable $check in /in/BVvXU on line 6 Deprecated: print_r(): Passing null to parameter #2 ($return) of type bool is deprecated in /in/BVvXU on line 6 Array ( [1] => 2 )
Output for 8.0.0 - 8.0.30
Warning: Undefined variable $check in /in/BVvXU on line 6 Array ( [1] => 2 )
Output for 5.0.4 - 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, 7.3.0 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
Notice: Undefined variable: check in /in/BVvXU on line 6 Array ( [1] => 2 )
Output for 7.3.32 - 7.3.33, 7.4.26
Array ( [1] => 2 )
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3
Notice: Undefined variable: check in /in/BVvXU on line 6 Array ( [1] => 2 )
preferences:
277.34 ms | 402 KiB | 456 Q