conn.php

<?php

$serverbname = "Servername";
$dbname ="DB_usernamet";
$pw = "DB_Passwort";
$tbl = "tbl_name";

//create connection
$conn = new mysqli($serverbname, $usrename, $pw, $dbname);

//check connection
if ($conn->connect_error) {
 die("Connection failedd: " .$conn->connect_error);
}

echo "connection with DB";
?>