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run code in 300+ PHP versions simultaneously
<?php $array1 = array( 1 => array('stuff'), 2 => array('stuff'), ); $array2 = array( 1 => array('other stuff'), 3 => array('other stuff'), ); print_r(array_merge($array1, $array2)); print_r($array1 + $array2);

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36.49 ms | 402 KiB | 5 Q