<?php
  $user = 'user';//that you have given in php myadmin
  $pass = 1234;//password you entered
  $host = 'localhost';//host you are using, unless your webpage is a part of hosted website, use localhost for all type of control panel, Xampp as well as wampp
  $db = 'mydb';//name of my database

  if($dbcon = mysqli_connect($host,$user,$pass,$db))//checks for validity of the credentials and remember the sequence of these variable should not be changed
  {
    echo "database connected";//if connection established
  }
    else {
          die('error');
        }
 ?>