我是一個相對較新的開發,但知道一些東西。奇怪的PHP要求/包括錯誤
我在做關於PHP的教程除了來自Lynda的基礎知識之外,還試圖創建數據庫類。
在課堂上寫完所有內容後,我試着查看是否建立了連接。
require_once("../includes/database.php");
if(isset($database)) {
echo "true<br />";
}else {
echo "false<br />";
}
上述代碼是我的測試,看看它是否是豪鵬
的問題是,當我試圖用「require_once(」 config.php中「);」在數據庫類中。
require_once("config.php");//line 13
class MySQLDatabase{
//code that is not important for this issue
}
這給我的網頁上看到以下錯誤(S):
Notice: Use of undefined constant DB_SERVER - assumed 'DB_SERVER' in E:\ProgramFiles\xampp\htdocs\photo_gallery\includes\database.php on line 13
Notice: Use of undefined constant DB_USER - assumed 'DB_USER' in E:\ProgramFiles\xampp\htdocs\photo_gallery\includes\database.php on line 13
Notice: Use of undefined constant DB_PASS - assumed 'DB_PASS' in E:\ProgramFiles\xampp\htdocs\photo_gallery\includes\database.php on line 13
Deprecated: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in E:\ProgramFiles\xampp\htdocs\photo_gallery\includes\database.php on line 13
Warning: mysql_connect(): php_network_getaddresses: getaddrinfo failed: No such host is known. in E:\ProgramFiles\xampp\htdocs\photo_gallery\includes\database.php on line 13
Warning: mysql_connect(): php_network_getaddresses: getaddrinfo failed: No such host is known. in E:\ProgramFiles\xampp\htdocs\photo_gallery\includes\database.php on line 13
數據庫連接失敗:php_network_getaddresses:的getaddrinfo失敗:沒有這樣的主機被稱爲
如果我使用(代碼下面)而不是require/require_once/include/include_once部分的工作!
define("DB_SERVER", "localhost");
define("DB_USER", "gallery");
define("DB_PASS", "123465");
define("DB_NAME", "photo_gallery");
這不是我第一次使用需要/包括......但我真的很困惑,爲什麼這種用這種方法doesen't工作: -/ (我會改變一切,以mysqli的一次,我完成用,因爲它是本教程的DB類。不,我沒有訪問練習文件)
(抱歉長後)
'config.php'中可能存在一些問題。 –
看來,在config.php中,您並沒有像您在示例中那樣定義常量。 正如它所說的,config.php中的常量似乎在其定義中缺少(花括號)大括號。 將coinfig.php添加到問題中(只需用空白替換登錄,傳遞和主機) –