3v4l.org

run code in 300+ PHP versions simultaneously
<?php $input = Array( Array ( 0 => 1 ), Array ( 0 => 2 ) ); $result = call_user_func_array("array_merge", $input); var_export($input); var_export($result);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array ( 0 => array ( 0 => 1, ), 1 => array ( 0 => 2, ), )array ( 0 => 1, 1 => 2, )
preferences:
222.71 ms | 406 KiB | 328 Q