What steps can be taken to troubleshoot a database connection issue in PHP?

If you are experiencing database connection issues in PHP, one common solution is to check the database credentials in your connection code to ensure they are correct. Additionally, you can try testing the connection by using PHP functions like mysqli_connect_error() to get more information about the error.

// Check database credentials
$servername = "localhost";
$username = "root";
$password = "password";
$database = "mydatabase";

// Create connection
$conn = mysqli_connect($servername, $username, $password, $database);

// Check connection
if (!$conn) {
    die("Connection failed: " . mysqli_connect_error());
}
echo "Connected successfully";