3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = [1=>1, 2=>2, 3=>3]; $bar = [1=>1, 2=>2, 3=>3]; var_dump($foo); var_dump($bar); var_dump(array_merge($foo, $bar));

preferences:
34.39 ms | 402 KiB | 5 Q