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Summary: Learn how to resolve the common PHP error "Fatal error: Class 'MySQLi' not found" and ensure smooth database connectivity in your web applications.
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Troubleshooting "Fatal error: Class 'MySQLi' not found" in PHP

If you've encountered the error message "Fatal error: Class 'MySQLi' not found" in your PHP application, it means that the MySQLi extension is not available or not properly configured on your server. MySQLi is a vital extension for interacting with MySQL databases in PHP, and resolving this issue is crucial for maintaining seamless database connectivity.

Here are steps to troubleshoot and fix this error:

Check PHP Version
Ensure that your PHP version supports MySQLi. MySQLi requires PHP 5 or later. You can check your PHP version by creating a simple PHP file with the following code:

[[See Video to Reveal this Text or Code Snippet]]

Open this file in a web browser and look for the PHP version. If your PHP version is below 5, consider upgrading.

Enable MySQLi Extension
Make sure that the MySQLi extension is enabled in your PHP configuration. Locate your php.ini file and ensure that the following line is uncommented (remove the semicolon at the beginning of the line if it exists):

[[See Video to Reveal this Text or Code Snippet]]

After making changes to the php.ini file, restart your web server to apply the modifications.

Install MySQLi Extension
If the MySQLi extension is not installed on your server, you need to install it. The process varies depending on your operating system.

For Linux (using apt-get):

[[See Video to Reveal this Text or Code Snippet]]

For Windows (using XAMPP):

Open the php.ini file in the "php" folder.

Uncomment the line:

[[See Video to Reveal this Text or Code Snippet]]

Save the changes and restart the Apache server.

Verify Installation
Create a PHP file with the following code to verify that MySQLi is now available:

[[See Video to Reveal this Text or Code Snippet]]

Replace "localhost," "username," "password," and "database" with your actual database details.

Conclusion
By following these steps, you should be able to resolve the "Fatal error: Class 'MySQLi' not found" issue in your PHP application. Ensuring that the MySQLi extension is installed, enabled, and properly configured is essential for establishing and maintaining a reliable connection to MySQL databases.