Sharing the steps to deal with DreamWeaver CMS database connection failure

DreamWeaver CMS (DedeCMS) is a commonly used content management system that is popular for its powerful functions and ease of use. However, sometimes you may encounter database connection failures during use, resulting in the website being unable to be accessed normally. This article will share the specific steps to deal with DreamWeaver CMS database connection failure, and provide code examples for your reference.

1. Check the database configuration

The first step is to confirm whether the database configuration is correct. Open the configuration file data/common.inc.php of DreamWeaver CMS and check the following configurations:

$db_host = 'localhost';        // 数据库主机地址
$db_user = 'root';             // 数据库用户名
$db_pass = 'password';         // 数据库密码
$db_name = 'dedecms';          // 数据库名称

Make sure the above information is consistent with your database information, especially the database host address, Username, password and database name.

2. Check the database connection code

The second step is to check the code involving database connection in the source code of DreamWeaver CMS, which is usually concentrated in include/common.inc.php middle. Find the following code:

$link = @mysql_connect($db_host, $db_user, $db_pass);
if (!$link) {
    die('Could not connect: ' . mysql_error());
}

mysql_select_db($db_name, $link);

Make sure the database connection information in the above code is consistent with your database information and the connection is successful. If the connection fails, an error message will be output.

3. Check the database status

The third step is to check whether the database is in a normal state. Log in to the database through a database management tool (such as phpMyAdmin) to check whether the database status is normal, whether the table exists, and whether the data is complete.

4. Rebuild the database connection

If the above steps do not solve the problem, you can try to rebuild the database connection. First, back up the original connection code, and then try to use PDO or mysqli to re-establish the database connection. The sample code is as follows:

$dsn = "mysql:host={$db_host};dbname={$db_name}";
try {
    $pdo = new PDO($dsn, $db_user, $db_pass);
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (PDOException $e) {
    die('Database connection failed: ' . $e->getMessage());
}

Using PDO or mysqli to re-establish the database connection can improve the stability and security of the connection. .

5. Contact technical support

If you have tried the above steps and still cannot solve the database connection failure, it is recommended to contact DreamWeaver CMS official or related technical support, they will provide more professional help and support.

The above are the steps and code examples for handling Dreamweaver CMS database connection failure. Hope this helps webmasters who encounter similar problems. Good luck with your website!

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