The primary reason for this error is that phpMyAdmin uses a different configuration file than Apache. When switching to a different PHP version, the php.ini file used by phpMyAdmin may not match the one used by Apache.Another possible cause is that the MySQL server is set up on a non-standard port,

How do I fix: Updating the phpMyAdmin configuration?

Step 1: Edit the phpMyAdmin config file (usually located in the phpmyadmin3.5.1 directory) to update the host, port, and socket settings.Step 2: Change the $cfg['Servers'][$i]['host'] setting from 'localhost:3307' to 'localhost'. This will tell phpMyAdmin to use the default host for your MySQL serve

Software⏱️ 3 min read📅 2026-06-19

How to Fix: Unknown SQL server host error in phpMyAdmin after switching php versions in WAMP

Q: Step-by-Step Verified Fixes Updating the php.ini configuration?

Step 1: Copy the php.ini file from the PHP 5.2.4 directory into the Apache bin directory.Step 2: Edit the copied php.ini file to update the mysql.default_port setting to match your MySQL server's port (in this case, 3307). You can do this by adding the following line to the php.ini file: `mysql.defa

Error in phpMyAdmin after switching php versions in WAMP

Quick Answer: Try updating the php.ini file to match the new PHP version and ensure the correct port settings are used.

📋 Table of Contents

⚠️ Common Causes
🛠️ Step-by-Step Verified Fixes
💡 Conclusion

The 'Unknown SQL server host' error in phpMyAdmin occurs when the MySQL server is not properly configured or recognized by phpMyAdmin. This issue affects users who switch to different PHP versions, such as from PHP 5.3.13 to PHP 5.2.4, while using WAMP Server.

This error can be frustrating for developers and administrators, especially when multiple PHP versions are installed on the same system. In this guide, we will walk you through the steps to resolve this issue.

⚠️ Common Causes

The primary reason for this error is that phpMyAdmin uses a different configuration file than Apache. When switching to a different PHP version, the php.ini file used by phpMyAdmin may not match the one used by Apache.
Another possible cause is that the MySQL server is set up on a non-standard port, which is causing phpMyAdmin to use the wrong host and port settings.

🛠️ Step-by-Step Verified Fixes

Updating the php.ini configuration

Step 1: Copy the php.ini file from the PHP 5.2.4 directory into the Apache bin directory.
Step 2: Edit the copied php.ini file to update the mysql.default_port setting to match your MySQL server's port (in this case, 3307). You can do this by adding the following line to the php.ini file: `mysql.default_port = 3307`
Step 3: Restart the Apache service for the changes to take effect.

Updating the phpMyAdmin configuration

Step 1: Edit the phpMyAdmin config file (usually located in the phpmyadmin3.5.1 directory) to update the host, port, and socket settings.
Step 2: Change the $cfg['Servers'][$i]['host'] setting from 'localhost:3307' to 'localhost'. This will tell phpMyAdmin to use the default host for your MySQL server.
Step 3: Leave the $cfg['Servers'][$i]['port'] setting as 3307, as this is the port number used by your MySQL server.

💡 Conclusion

To resolve the 'Unknown SQL server host' error in phpMyAdmin after switching to PHP 5.2.4, try updating the php.ini configuration or updating the phpMyAdmin configuration file. If you are still experiencing issues, check that your MySQL server is properly configured and running on the correct port.

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