Are you hitting this error in your terminal while running any command for Laravel Project? If yes, then this error occurs in Laravel if extension=mysqli is loaded twice in php.ini file.
To solve this error open Wamp\Php\php.ini file
Check if extension=mysqli is mentioned twice in the code.
If you found it twice then comment the second extension=mysqli by adding a semicolon before the second extension=mysqli like this:
This will resolve the current error.