How to Fix 'Failed to Connect to MySQL' Error in PHP?

Connecting to MySQL Database in PHP with mysqli

While connecting to a database on a web server, an error message stating "Failed to connect to MySQL" can arise. This article addresses this issue and provides solutions.

The provided code connects to a database using mysqli_connect, but lacks the required server name parameter.

解决方案 1：

mysqli_connect("localhost","username" ,"password","databasename");

In this case, "localhost" represents the server name.

解决方案 2 (mysqli Procedural):

$servername = "localhost";
$username = "username";
$password = "password";

$con = mysqli_connect($servername, $username, $password);

This approach uses separate variables for server name, username, and password.

解决方案 3:

In some cases, the server may use the root user with an empty password.

$servername = "localhost";
$username = "root";
$password = "";

注意： Ensure that you use the correct server name, username, and password for your database configuration.

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