3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a1 = ['test' => [1 => 'first'], ['val']]; $a2 = ['test' => [2 => 'second'], ['val2']]; $a3 = $a1 + $a2; var_dump($a3);

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60.14 ms | 402 KiB | 5 Q