How to fix the error establishing a Database Connection in WordPress?

The “Error Establishing a Database Connection” in WordPress is a common issue that usually occurs when WordPress is unable to connect to the database. This can happen for various reasons, and here are steps to troubleshoot and fix the problem:

  1. Check Database Credentials:

    • Open your wp-config.php file, which is located in the root directory of your WordPress installation.
    • Confirm that the database name, username, password, and host are correctly defined. Ensure there are no typos or errors.
  2. Verify Database Server is Running:

    • Ensure that your database server is running. If you’re unsure, contact your hosting provider or server administrator.
  3. Check Database Quota:

    • Confirm that you haven’t exceeded your database quota if you’re on a shared hosting plan. Reach out to your hosting provider for assistance.
  4. Repair Database Tables:

    • WordPress has a built-in feature to repair and optimize database tables. Add the following line to your wp-config.php file:
      define('WP_ALLOW_REPAIR', true);
    • Access the repair tool by visiting in your browser. Replace “” with your actual domain.
    • Follow the on-screen instructions to repair your database.
  5. Check Web Host Server Issues:

    • Contact your hosting provider to inquire about any server issues. It’s possible that the MySQL server might be down or experiencing problems.
  6. Increase Memory Limit:

    • Insufficient memory can lead to database connection errors. Increase the memory limit by adding the following line to your wp-config.php file:
      define('WP_MEMORY_LIMIT', '64M');
    • Adjust the value as needed.
  7. Check for Plugin or Theme Conflicts:

    • Deactivate all plugins by renaming the plugins folder in the wp-content directory.
    • Switch to a default WordPress theme (e.g., Twenty Twenty-One) by renaming your current theme’s folder in the wp-content/themes directory.
    • Check if the error persists. If it doesn’t, reactivate plugins and theme one by one to identify the conflicting one.
  8. Database Connection Test:

    • Create a new PHP file (e.g., testdb.php) and add the following code:
      $link = mysqli_connect('localhost', 'db_user', 'db_password');
      if (!$link) {
      die('Could not connect to MySQL: ' . mysqli_error());
      echo 'Connected successfully';
    • Replace ‘localhost’, ‘db_user’, and ‘db_password’ with your actual database host, username, and password.
    • Upload this file to your WordPress root directory and access it through your browser (e.g., This will help you determine if there’s a database connection issue.

If none of the above steps resolves the issue, it’s recommended to contact your hosting provider’s support for further assistance. They can investigate server-side issues and provide specific guidance based on your hosting environment. Also check designrush



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