3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $x = [ 'a' => 3, 'b' => 6, ]; $y = [ 'c' => 1, 'd' => 3, 'a' => 1, ]; var_dump($x + $y); var_dump($y + $x);
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(4) { ["a"]=> int(3) ["b"]=> int(6) ["c"]=> int(1) ["d"]=> int(3) } array(4) { ["c"]=> int(1) ["d"]=> int(3) ["a"]=> int(1) ["b"]=> int(6) }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/Eg5hQ on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/Eg5hQ on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/Eg5hQ on line 3
Process exited with code 255.