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<?php $ids = array("8479"); $newIds = array_filter($ids, function(&$n) { $n = intVal($n); }); print_r($newIds);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: {closure}(): Argument #1 ($n) must be passed by reference, value given in /in/WH94Q on line 5 Array ( )

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