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Copy-ready answers to everyday coding questions, each with a short explanation. Laravel, PHP, JavaScript, SQL, Bash and more.

1 snippet tagged #array_map · Show all

PHP October 15, 2026 PHP arrow functions with array_map and array_filter Arrow functions (fn) are one-line closures that capture outer variables by value automatically. Note that array_filter keeps keys, so wrap it in array_values()... <?php $nums = range(1, 10); $result = array_map(fn ($n) => $n ** 2, array_filter($nums, fn ($n) => $n % 2 === 0));

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