how to configure SQL Server With php 8.2 on iis Server

<?php
if($_REQUEST['tablename'])
{
    $servername="New-3\SQLEXPRESS";
    $database="mydb"; $uid='',
    $passw="";

    // Create database connection
    try {
            $conn = new PDO (sqlsrv:Server=$servername,Database=$database, $uid, $passw);
            $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
        } 
    catch (PDOException $e) 
    {
        die ("Error connecting to SQL Server: ". $e->getMessage());

    }
}
?>

this code gives error

Error connecting to SQL Server: SQLSTATE [08001]: [Microsoft] [ODBC Driver 17 for SQL Server] Named Pipes Provider: Could not open a connection to SQL Server [53].