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<?php ini_set('display_errors', true); ini_set('error_reporting', -1); $a = [["5","131"],["1","515"],["2","333"],["3","28"],["4","13"]]; var_dump($a, array_walk_recursive($a, 'intval'), $a);
Output for git.master, git.master_jit, rfc.property-hooks
array(5) { [0]=> array(2) { [0]=> string(1) "5" [1]=> string(3) "131" } [1]=> array(2) { [0]=> string(1) "1" [1]=> string(3) "515" } [2]=> array(2) { [0]=> string(1) "2" [1]=> string(3) "333" } [3]=> array(2) { [0]=> string(1) "3" [1]=> string(2) "28" } [4]=> array(2) { [0]=> string(1) "4" [1]=> string(2) "13" } } bool(true) array(5) { [0]=> array(2) { [0]=> string(1) "5" [1]=> string(3) "131" } [1]=> array(2) { [0]=> string(1) "1" [1]=> string(3) "515" } [2]=> array(2) { [0]=> string(1) "2" [1]=> string(3) "333" } [3]=> array(2) { [0]=> string(1) "3" [1]=> string(2) "28" } [4]=> array(2) { [0]=> string(1) "4" [1]=> string(2) "13" } }

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