Software⏱️ 2 min read📅 2026-05-31

How to Fix: How to solve "Fatal error: Class 'MySQLi' not found"?

MySQLi extension not enabled in PHP 5.2.5.

Quick Answer: Enable the MySQLi extension by adding it to your php.ini file or using a different database library.

The error 'Fatal error: Class 'MySQLi' not found' typically occurs when the MySQLi extension is not enabled in your PHP installation. This can be due to several reasons, including outdated PHP versions or missing extensions.

🛑 Root Causes of the Error

  • The MySQLi extension is not enabled in your PHP installation.

🔧 Proven Troubleshooting Steps

Method 1: Enable MySQLi Extension

  1. Step 1: Open your php.ini file in a text editor and look for the line that starts with 'extension'.

Method 2: Update PHP Version

  1. Step 1: Check if you are running a version of PHP that supports the MySQLi extension.

Method 3: Install PECL MySQLi

  1. Step 1: Download and install the PECL MySQLi extension using your package manager.

💡 Conclusion

To resolve this issue, you can try enabling the MySQLi extension in your PHP installation or updating to a version that supports it. If these methods do not work, consider installing the PECL MySQLi extension.

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