3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a=array("1","2","3","4"); array_unshift($a); print_r($a);
Output for 5.3.0 - 5.6.28, 7.0.0 - 7.1.0
Warning: array_unshift() expects at least 2 parameters, 1 given in /in/ZtAQn on line 3 Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 )
Output for hhvm-3.10.0 - 3.12.0
Warning: array_unshift() expects exactly 2 parameters, 1 given in /in/ZtAQn on line 3 Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 )
Output for 4.3.0 - 5.2.17
Warning: Wrong parameter count for array_unshift() in /in/ZtAQn on line 3 Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 )