ivan tsai
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    # domjudge如何寫成 整體採用symfony framework,是由 php 為基礎所寫成的框架 ![](https://i.imgur.com/W4zYgOv.png) 基於symfony framework 採用 MVC 架構,將前後端分離以下分為前後端來介紹 前端 --- 使用twig template的樣版式設計,保持網頁的一致性與擴展性,所有的網頁為了保持整體結構的一致性,都由原始的樣板做延伸,搭配每個頁面所需的不同功能做擴展。 >通常會搭配Symfony framework去做使用 <br/> Twig 是功能最豐富、也是功能最強大的 PHP 模板引擎之一,主要的特點有 - 快速 - 將模板編譯為簡單優化的 PHP 代碼。與常規 PHP 程式碼相比,減少資源浪費。 - 安全 - 也一個sandbox模式來評估不受信任的程式碼,允許twig作為應用程式的模板語言,使用者可以在其中修改模板設計 - 靈活 - 支援靈活的parser 和lexer,允許開發者自己定義tag和filters,和建立自己的DSL - 對設計師與開發人員友善 - 語法容易理解且避免在模板文件中對php實現動態操作,非常現代化,幾乎可以適應最新的編碼標準 <br/> 富有以下優點: - 簡潔 - 簡短的轉譯 - 多重繼承 - 將模板劃分為 - 區塊(Blocks) - 組件(Compentents),以維護模組化設計。 - 易於學習 - 可擴展性優良 - 單元測試 - 有完整文件 - 安全 - 自動輸出轉譯 - sandbox - 快速 不僅如此,開發人員還可以透過添加更多的外掛(plug-in)來滿足任何前端需求。 --- 以下可以看一個簡單的範例: 普通的php寫出的web會長這樣: ```php= <?php echo $foo; //$foo為隨一個變數 ?> <?php echo htmlchars( $foo, ENT_QUOTES, 'UTF-8') ?> ``` twig 中則可以簡化成: ```php= {{ foo }} //宣告變數 {{ foo|escape }} {{ foo|e }}{# shortcut to escape a variable #} ``` 後端 --- 遵循 lnmp 或是 lamp 架構 - Linux(官方文件建議採用Debian) - 作為基礎OS - nginx/apach - 作為 web server - MySQL/MairaDB - 作為 database,存放所需要的資料 - php (使用Symfony框架) - 作為 cgi,與http server或其他部件進行溝通,擁有標準輸入輸出和環境變數

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