ivan tsai
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    # symfony 運作方式 基本原則 === 框架的作用之一,是保持你的code擁有良好的組織性;同時還能通過避免將資料庫查詢、html標籤以及其他PHP code整合到同一環境中而令你的程式輕鬆與時俱進。為了用Symfony實現這目標,你需要學習以下幾個概念。 當開發Symfony程序時,作為開發者的責任,是寫出能夠迎合使用者請求(request)(比如:```http://localhost:8080```)的code,並將與請求相對應的資源顯示出來。(如homepage頁面) 使用者請求所執行的code,被定義於PHP class的方法之中。這些方法被稱為actions,而class則稱作controllers(控制器)。使用者請求和code之間的映射關係則被定義於routing(路由)配置中。瀏覽器顯示的內容一般是通過templates(模板)來輸出的。 當你瀏覽之前的```http://localhost:8080```時,Symfony執行了在```src/AppBundle/Controller/DefaultController.php```文件中定義的控制器,並渲染輸出```app/Resources/views/default/index.html.twig```模板。 ![](https://i.imgur.com/ugdSSJy.png) 採用MVC架構 ![](https://i.imgur.com/DXWPUxD.png) 整體運作構造複雜,不過透過使用框架,只需要寫少量的程式碼,就可以進行開發 創造頁面的基礎知識(twig與template有更詳細的解說) === 要生成symfony頁面之前,要先建立模組(modules),頁面最初是建立空殼,具有symfony可以識別的文件結構 添加頁面與添加動作(action),每個頁面生成背後的邏輯都是動作(action)並且透過模版來展示頁面,剩餘沒有邏輯的頁面背後還是要有空白動作empty action 增加template 頁面由動作與模版(template)所組成。 根據function或application整體構成一個模組(modules) helper有助於編寫模版(templates),helper是由symfony所提供的返回html code的函數 並且您需要將 URL 視為response的一部分,可以根據需要對其進行格式化,因此您應該避免在操作命名或請求參數檢索中使用對 URL 的任何直接引用

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