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                以下是thinkphp的Collection源碼 ~~~ class Collection { protected $items = []; public function __construct($items = []) { $this->items = $this->convertToArray($items); } // 靜態方法創建一個Collection實例 public static function make($items = []) { return new static($items); } } ~~~ 這是一個通用套路,yii2里面也是這么寫,都是這么寫。 public的static方法保證了不用實例化就可以調用make方法,一旦調用,則調用__construct,存入item數組參數,返回一個Collection對象。 * * * * * 我們可以在paginator源碼里面看到如何調用的 ~~~ if (!$items instanceof Collection) { $items = Collection::make($items); } ~~~ 再看$items是如何用的 ~~~ $items->slice($this->listRows, 1); ~~~ slice是Collection類中的public方法 也就是說,傳入一個item數組參數,通過make方法,返回一個Collection對象。
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