3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array1 = array( 12 => 42, 13 => 42, 14=> 42, 15=>42 ); $array2 = array( '12' => 43, 14 => 43, 15=>43, 16=>43 ); var_dump($array1 + $array2); var_dump($array2 + $array1);

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36.47 ms | 402 KiB | 5 Q