How to Fix the \'The mysqli extension is missing\' Error in PHP?

Troubleshooting "The mysqli extension is missing" Error

Encountering the error message "The mysqli extension is missing" during PHP execution can be frustrating. Despite searching forums and following recommended solutions, the issue persists. This article will guide you through a comprehensive troubleshooting process to resolve this error.

1. Locate the Correct php.ini File

Identify the php.ini file that is being used by PHP. Typically, it is located in /etc/php5/apache2/php.ini or /etc/php/7.0/apache2/php.ini.

2. Uncomment mysqli Extension

Open the php.ini file and search for the line "extension=mysqli". If it is commented out using a semicolon (;), uncomment it by removing the semicolon.

3. Specify PHP Extension Path

If the mysqli extension does not appear in phpinfo(), you may need to specify the path to the mysqli PHP extension. Replace the line "extension=mysqli" with the following:

extension="C:\php\ext\php_mysqli.dll"

Replace "C:phpextphp_mysqli.dll" with the correct path to the mysqli extension on your system.

4. Restart Apache

Restart the Apache web server to apply the changes made to the php.ini file. On Linux, run the following command:

sudo service apache2 restart

On Windows, restart Apache from the Services control panel.

5. Verification

Visit a PHP page that uses mysqli functions. If the error is resolved, the page should load successfully. Otherwise, check the Apache error log for additional details.

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