3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = ["username"=> 'asdfasf', 'avatar' => 'test']; $b = ['username' => 'test']; $c = array_merge($a, b); var_dump($c);
Output for 7.2.0
Warning: Use of undefined constant b - assumed 'b' (this will throw an Error in a future version of PHP) in /in/lZveI on line 5 Warning: array_merge(): Argument #2 is not an array in /in/lZveI on line 5 NULL
Output for 5.4.11 - 7.1.10
Notice: Use of undefined constant b - assumed 'b' in /in/lZveI on line 5 Warning: array_merge(): Argument #2 is not an array in /in/lZveI on line 5 NULL
Output for 5.3.21 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/lZveI on line 3
Process exited with code 255.