3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array1 = [ [10, 'Some Name..'], [11, 'Some Name..'], [13, 'Some Name..'], ]; $array2 = [ [13, 'Viewed'] ]; var_export(array_merge_recursive($array1, $array2));

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112.7 ms | 1409 KiB | 5 Q