PROBLEM MYSQL PHPSTORM

Hi everyone,

It's been an hour that iw as trying to fix this but apperently i cannot figure it out by myself and with the help of internet.

i have a php page with this code

$address = $_REQUEST["address"];
$username = $_REQUEST["username"];
$password = $_REQUEST["password"];

// Create connection
$connection = new mysqli($address, $username, $password, "VIDEOGAME");

// Check connection
if ($connection -> connect_error) {
    // JUMP TO OTHER PAGE
    die("CONNECTION FAILED: " . $connection -> connect_error);
}

the problem is that when i try to run the code i get an error like this

Uncaught Error: Class 'mysqli' not found in FILENAME.PHP on line LINENUMBER

PHPSTORM is connected via XAMMP PHP and i have checked the php.ini and i have the include the extension_dir and all the extension of mysql but the problem persit, how to fix it?