hOW To Fix Error Establishing a Database Connection Print

Check wp-config.php: Verify the database name, username, password, and host are correct:

define('DB_NAME', 'your_database_name');
define('DB_USER', 'your_username');
define('DB_PASSWORD', 'your_password');
define('DB_HOST', 'localhost');

Test Database Connection: Use a simple PHP script to confirm the database credentials:

<?php
$link = mysqli_connect('localhost', 'username', 'password', 'database');
if (!$link) {
    die('Could not connect: ' . mysqli_error());
}
echo 'Connected successfully';
?>

Contact Hosting Support: If the credentials are correct but the error persists, your database server might be down.