<?php
$db_host='localhost';
$db_username='root';
$db_password='';
$db_name='testdb';
$con=mysqli_connect("$db_host","$db_username","$db_password") or die ("couldnt able to connect with database");
mysqli_select_db("$con", 'testdb')or die ("No database");
echo "succesful connection";
?>