Solving the 'Connection for ControlUser as Defined in Your Configuration Failed' Error: A Step-by-Step Guide

The 'Connection for ControlUser as Defined in Your Configuration Failed' error is a common issue faced by developers while working with phpMyAdmin. This guide aims to provide a step-by-step solution to help you resolve this error and get back to managing your databases with ease.

Table of Contents

Understanding the Error

The 'Connection for ControlUser as Defined in Your Configuration Failed' error occurs when phpMyAdmin cannot establish a connection with the MySQL server using the control user defined in your configuration file. This can be caused by incorrect login credentials or other connection settings.

Step-by-Step Solution

Step 1: Locate the Configuration File

The first step is to locate the phpMyAdmin configuration file, named This file can be found in the phpMyAdmin installation directory. The location of this directory depends on your operating system and web server configuration. Some common locations include:

  • /etc/phpmyadmin/ (Linux systems)
  • /usr/local/etc/phpmyadmin/ (macOS with Homebrew)
  • C:\xampp\phpMyAdmin\ (Windows with XAMPP)

Step 2: Modify the Configuration File

Once you have located the file, open it with a text editor and search for the following lines:

$cfg['Servers'][$i]['controluser'] = 'pma';
$cfg['Servers'][$i]['controlpass'] = 'pmapass';

The controluser and controlpass values should match the login credentials of your MySQL control user. If these values are incorrect or empty, update them with the correct credentials. If you are not sure about the correct credentials, contact your server administrator or hosting provider.

In some cases, you might also need to update the host and port values in the configuration file. Look for the following lines:

$cfg['Servers'][$i]['host'] = 'localhost';
$cfg['Servers'][$i]['port'] = '';

Make sure the host value is set to the correct hostname or IP address of your MySQL server. If your server is running on a non-default port, update the port value accordingly.

Step 3: Restart the Web Server

After updating the configuration file, save the changes and restart your web server to apply the changes. The process to restart the web server varies depending on your operating system and web server software. Some common commands include:

  • sudo service apache2 restart (Linux with Apache)
  • sudo service nginx restart (Linux with Nginx)
  • sudo apachectl restart (macOS with Homebrew)
  • xampp-control.exe (Windows with XAMPP, use the graphical interface to restart the server)

Once the web server has restarted, try accessing phpMyAdmin again. The 'Connection for ControlUser as Defined in Your Configuration Failed' error should be resolved.


Why does the error message mention a "control user"?

A control user is a special MySQL user account that phpMyAdmin uses to manage advanced features, such as bookmarked queries, column comments, and the Designer interface. This user requires limited privileges and access to the phpmyadmin database.

Can I disable the control user feature?

Yes, you can disable the control user feature by commenting out or removing the controluser and controlpass lines in the file. However, doing so will disable advanced features in phpMyAdmin that rely on the control user.

Can I use the root user as the control user?

While it is technically possible, using the root user as the control user is not recommended due to security risks. Instead, create a separate user with limited privileges for the control user.

How do I create a new control user in MySQL?

You can create a new control user in MySQL by executing the following SQL commands:

CREATE USER 'pma'@'localhost' IDENTIFIED BY 'pmapass';
GRANT SELECT, INSERT, UPDATE, DELETE ON phpmyadmin.* TO 'pma'@'localhost';

Replace 'pma' and 'pmapass' with your desired control user name and password, respectively.

How do I check the MySQL server's hostname and port?

You can check the MySQL server's hostname and port by running the following command in the MySQL command line interface:

SHOW VARIABLES WHERE Variable_name = 'hostname' OR Variable_name = 'port';

Alternatively, you can check the MySQL server's configuration file (e.g., my.cnf or my.ini) for the bind-address and port settings.

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