| 闭包函数 | | | --- | ---| ``` /** * [closure 闭包函数] * @return [type] [description] */ public function closure() { $num = 10; $total = 0; $arr = Array ( 'butter' => 12, 'milk' => 33, 'eggs' => 64 ); $call_back = function($val, $key)use ($num, &$total) { $total += ($val + $num) * 1; }; array_walk($arr, $call_back); print_r($total); } ```