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<?php $a1 = [84, 6, 3, 21]; $a2 = [15, 3, 0, 26]; var_dump(array_map('array_sum', array_map(null, $a1, $a2))); var_dump(array_map(fn(...$vs) => array_sum($vs), $a1, $a2));
Output for git.master, git.master_jit, rfc.property-hooks
array(4) { [0]=> int(99) [1]=> int(9) [2]=> int(3) [3]=> int(47) } array(4) { [0]=> int(99) [1]=> int(9) [2]=> int(3) [3]=> int(47) }

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