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<?php $factor = 10; // pre PHP 7.4 $nums = array_map(function($n) use ($factor) { return $n * $factor; }, [1,2,3,4]); var_dump($nums); // PHP 7.4 $nums = array_map(fn($n) => $n * $factor, [1, 2, 3, 4]); var_dump($nums);
Output for git.master, git.master_jit, rfc.property-hooks
array(4) { [0]=> int(10) [1]=> int(20) [2]=> int(30) [3]=> int(40) } array(4) { [0]=> int(10) [1]=> int(20) [2]=> int(30) [3]=> int(40) }

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