3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $input = Array( Array ( 0 => 1 ), Array ( 0 => 2 ) ); $result = call_user_func_array("array_merge", $input); var_export($result);
Output for 4.3.0 - 5.6.30, hhvm-3.10.1 - 3.22.0, 7.0.0 - 7.2.1
array ( 0 => 1, 1 => 2, )