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<?php $array = [ ['a' => 1, 'b' => 2], ['a' => 2, 'b' => 2] ]; $data = ['count'=>0,'a'=>0,'b'=>0]; $cb = function($value, $key) { var_dump($value); }; array_walk($array, $cb, $data);
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { ["a"]=> int(1) ["b"]=> int(2) } array(2) { ["a"]=> int(2) ["b"]=> int(2) }

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