array outside of the class, can’t access [duplicate]

Why i cant acess the $INI array inside the DB Class? I get always an null value.

php/db.php

<?php
class DB
{
    static function connection()
    {
        //mysqli_report(MYSQLI_REPORT_OFF);
        $mysqli = @new mysqli($INI["db_host"],
            $INI["db_user"],
            $INI["db_pass"],
            $INI["db_name"],
            $INI["db_port"]);
        if ($mysqli->connect_error) {
            echo "Error: " . $mysqli->connect_error;
        } else {
            echo "Success";
        }
    }
}

php/config.php

<?php
<?php
$INI = array(
    "db_host" => "localhost",
    "db_user" => "root",
    "db_pass" => "",
    "db_name" => "website",
    "db_port" => "3307"
);

index.php

<?php
require_once("php/config.php");
require_once("php/db.php");
DB::connection();
?>

Why i can’t access the $INI array values?

Fatal error: Uncaught mysqli_sql_exception: Es konnte keine Verbindung hergestellt werden, da der Zielcomputer die Verbindung verweigerte in C:wamp64wwwwebsitephpdb.php on line 8

mysqli_sql_exception: Es konnte keine Verbindung hergestellt werden, da der Zielcomputer die Verbindung verweigerte in C:wamp64wwwwebsitephpdb.php on line 8