Connection to sql server 2014 with php

I am trying to connect database in sql server 2014 with php as follows:

First I have this script in conexaosql.php:

class Conexao
{
    private static $connection;

    private function __construct(){}

    public static function getConnection() {

        $pdoConfig  = DB_DRIVER . ":". "Server=" . DB_HOST . ";";
        $pdoConfig .= "Database=".DB_NAME.";";

        try {
            if(!isset($connection)){
                $connection =  new PDO($pdoConfig, DB_USER, DB_PASSWORD);
                $connection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
            }
            return $connection;
         } catch (PDOException $e) {
            $mensagem = "Drivers disponiveis: " . implode(",", PDO::getAvailableDrivers());
            $mensagem .= "nErro: " . $e->getMessage();
            throw new Exception($mensagem);
         }
     }
}

Then I call this script and I have the following code:

define('DB_HOST'        , "xxxx");
define('DB_USER'        , "xxxx");
define('DB_PASSWORD'    , "xxxx");
define('DB_NAME'        , "xxxx");
define('DB_DRIVER'      , "sqlsrv");

require ("conexaosql.php");

try{

    $Conexao    = Conexao::getConnection();
    $query      = $Conexao->query("SELECT Pago FROM UTE02.dbo.Recibos");
    $produtos   = $query->fetchAll();

 }catch(Exception $e){

    echo $e->getMessage();
    exit;

 }

I get the following error when I run the code:

mysql,sqlite Erro: could not find driver

I’m using php 8.1 and apache. I leave the link with images from phpinfo()