3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array (1, 2, 3); $b = array (’a’ => 1, 2, 3); var_dump ($a + $b);
Output for 4.3.0 - 7.1.0
Notice: Use of undefined constant ’a’ - assumed '’a’' in /in/bXnMo on line 4 array(4) { [0]=> int(1) [1]=> int(2) [2]=> int(3) ["’a’"]=> int(1) }