Error Overview: “Your PHP installation appears to be missing the MySQL extension which is required by WordPress”
This error is a common issue faced by WordPress users, particularly when there’s an incompatibility between the PHP version running on the server and the MySQL extension required by WordPress. Without the necessary MySQL extension, WordPress cannot connect to the database, leading to this error.
For instance, if you’re running an outdated WordPress version (below 3.9) on a modern PHP version (7.0 or higher), the deprecated MySQL extension may not be available. Modern PHP versions rely on MySQLi or PDO_MySQL extensions, causing WordPress to throw this error if it’s expecting the older MySQL extension.
Here are the primary causes of this issue:
Outdated WordPress Version
Using an old WordPress version can lead to compatibility issues with modern PHP versions.
Improper PHP Configuration
After migrating or updating your website, mismatched PHP configurations may cause this error.
Missing MySQL Extension
Some operating systems don’t include the MySQL extension by default. If it’s not installed or enabled, the error will persist.
Upgrade WordPress
An outdated WordPress version is a leading cause of this error. Follow these steps to update your WordPress installation:
Log in to your WordPress dashboard (e.g., example.com/wp-admin).
Navigate to Dashboard > Updates.
Click Update Now to install the latest WordPress version.
If the error persists even with the updated version, consider reinstalling WordPress to ensure all files are configured correctly.
Check Your PHP Version
Ensure you are using a supported PHP version (preferably 7.4 or later). Here’s how:
Connect to your website via FTP.
Create a file named info.php in your WordPress root directory (where wp-config.php is located).
Add the following code:
<?php
phpinfo();
?>
Save the file and open it in your browser (example.com/info.php).
Look for your PHP version.
If the error persists even with the updated version, consider reinstalling WordPress to ensure all files are configured correctly.
Properly Configure the PHP MySQL Extension
If you’ve recently migrated or updated your site, the PHP configuration might need adjustment:
Use the info.php file to locate the php.ini file under “Loaded Configuration File.”
Access the php.ini file via FTP.
Ensure the line extension=mysqli or extension=pdo_mysql is uncommented (remove any preceding ;).
Save changes and restart the server.
If you’re unable to resolve the issue, your hosting provider can assist in properly configuring the PHP extensions.
Verify the MySQL Extension Installation
Open the info.php file in your browser.
Search for mysql or mysqli.
If the field is blank, the MySQL extension isn’t installed. Contact your hosting provider to install and enable the MySQL extension on the server.
This guide outlines the key reasons behind the “Your PHP installation appears to be missing the MySQL extension” error and provides actionable solutions to fix it.
At COLO BIRD, we’re here to help you maintain a seamless WordPress experience. If you’re facing challenges resolving this error or need assistance with WordPress hosting, our expert team is available 24/7 to provide tailored solutions.