[TOC] #### $_GPC 全局請求常量, 獲取 $_GET, $_POST, $_COOKIES 中的變量 #### $_G 配置相關 **$_G**（大寫G）,是系統中最為重要的全局變量，系統中很多常用的數據都存儲在這個變量之中，下面我們詳細講解一下此變量的結構 使用示例： ~~~ public function index() { global $_G,$_GPC; p($_G); $this->display('index/index'); } ~~~ 輸出結果： ~~~ Array ( [config] => Array ( [DEFAULT_PAGE] => 10 [HTTP] => http [MASTER] => app [ADDONS] => addons [TPL] => tpl [TPL_DEFAULT] => bootstrap [TPL_STATUS] => [ATTACHMENT] => attachment ) [database] => Array ( [database_type] => mysql [database_name] => calfbaby [server] => 127.0.0.1 [username] => root [password] => 123456 [charset] => utf8 [port] => 3306 [prefix] => calf_ ) [APP_URL] => http://www.calfbb.com/index.php [APP] => http://www.calfbb.com/ [ATTACHMENT_ROOT] => http://www.calfbb.com/attachment ) ~~~ 配置 | 變量名稱 | 類型 | 說明 | 示例 | | --- | --- | --- | --- | | $_G['config'] | array | 主設置 | | | $_G['database'] | array | 當前數據庫配置 | | | $_G['cache'] | array | 緩存配置 | | | $_G['file'] | array | 文件上傳配置 | | | $_G['log'] | array | 日志配置 | | | $_G['route'] | array | 路由配置 | | | $_G['system'] | array | 系統相關配置 | | #### $_G 常量相關 | 常量名稱 | 說明 | 示例 | | --- | --- |--- | | $_G['APP_URL'] | 當前web域名下入口文件 | http://www.calfbb.com/index.php | | $_G['APP'] | 當前web域名 | http://www.calfbb.com | | $_G['ATTACHMENT_ROOT'] | web上傳附件目錄 | http://www.calfbb.com/attachment | #### 預定義全局常量 | 常量名稱 | 說明 | 示例 | | --- | --- |--- | | CALFBB | 系統根目錄 | /data/test/calfbb | | APP | 定義當前模塊絕對路徑 | /data/test/calfbb/模塊名/ | | MODULE | 定義當前模塊名稱 | app | | ATTACHMENT_ROOT | //==附件地址絕對路徑 | /data/test/calfbb/attachment/ |