3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $input = Array( Array ( 0 => 1, 1 => 2, 2 => 3, 3 => 4 ), Array ( 0 => 2, 1 => "aaa" ) ); //$result = call_user_func_array("array_merge", $input); $result = array_merge($input); var_export($result);
Output for 4.3.0 - 7.2.0
array ( 0 => array ( 0 => 1, 1 => 2, 2 => 3, 3 => 4, ), 1 => array ( 0 => 2, 1 => 'aaa', ), )