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<?php function square(&$n) { if(is_numeric($n)) $n = ($n * $n); } $array = array(0, 48, 22, 90, 44, 9, 222, 'Iamzheasshole', 101); array_walk($array, 'square'); print_r($array);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => 0 [1] => 2304 [2] => 484 [3] => 8100 [4] => 1936 [5] => 81 [6] => 49284 [7] => Iamzheasshole [8] => 10201 )

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