我有里面已经有的database.php 。require_once('../config.php')
我不明白为什么我仍然需要将require_once('../config.php')
and都require_once('../database.php')
放在我的index.php中,而不是require_once('../database.php')
仅仅因为require_once('../config.php')
已经在database.php中?
require_once('../config.php')
如果我在index.php中删除,我会收到错误消息。
<pre>Notice: Use of undefined constant DB_SERVER - assumed 'DB_SERVER' in C:\xampp\htdocs\lyndaphoto\includes\database.php on line 18
Notice: Use of undefined constant DB_USER - assumed 'DB_USER' in C:\xampp\htdocs\lyndaphoto\includes\database.php on line 18
Notice: Use of undefined constant DB_PASS - assumed 'DB_PASS' in C:\xampp\htdocs\lyndaphoto\includes\database.php on line 18
Warning: mysql_connect() [function.mysql-connect]: php_network_getaddresses: getaddrinfo failed: No such host is known. in C:\xampp\htdocs\lyndaphoto\includes\database.php on line 18
Warning: mysql_connect() [function.mysql-connect]: [2002] php_network_getaddresses: getaddrinfo failed: No such host is known. (trying to connect via tcp://DB_SERVER:3306) in C:\xampp\htdocs\lyndaphoto\includes\database.php on line 18
Warning: mysql_connect() [function.mysql-connect]: php_network_getaddresses: getaddrinfo failed: No such host is known. in C:\xampp\htdocs\lyndaphoto\includes\database.php on line 18</pre>
config.php
$server = "localhost";
$user = "root";
$db_pass = "password";
$db_name = "photo_gallery";
define("DB_SERVER", $server);
define("DB_USER", $user);
define("DB_PASS", $db_pass);
define("DB_NAME", $db_name);
database.php
require_once("config.php");
class MySQLDatabase {
private $connection;
function __construct() {
$this->open_connection();
}
public function open_connection() {
$this->connection = mysql_connect(DB_SERVER, DB_USER, DB_PASS);
if (!$this->connection) {
die("Database connection failed: " . mysql_error());
}else {
$db_select = mysql_select_db(DB_NAME, $this->connection);
if (!$db_select) {
die("Database selection failed: " . mysql_error());
}
}
}
public function close_connection() {
if(isset($this->connection)) {
mysql_close($this->connection);
unset($this->connection);
}
}
}
$database = new MySQLDatabase();
$db =& $database;
这两个文件都在“localhost/photogallery/includes/” 提前谢谢!:)