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                ## 匿名函數 匿名函數(Anonymous functions),也叫閉包函數(closures),允許 臨時創建一個沒有指定名稱的函數。最經常用作回調函數(callback)參數的值。當然,也有其它應用的情況。 ```php // 無參數 $fun = function (){ return 'this is test func'; }; echo $fun(); // 有參數 $fun02 = function ($name){ return 'this is test func '.$name; }; echo $fun02('Tinywan'); // create_function() $fun03 = create_function('','echo "this is create_function";'); echo $fun03(); // this is create_function // 系統函數 $tmp_arr2 = [2, 4, 6, 8]; $res2 = array_map(function ($v) { return $v * 2; }, $tmp_arr2); print_r($res2); ```
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