<?php

$username = $_post['username'];
$password = $_post['password'];

if( empty( $username ) === false && empty( $password ) === false ) {


    $connect = mysql_connect("localhost","root","") or die("Couldn't connect");
    mysql_select_db("hub") or die("Couldn't find database");


    $query = mysql_query( "SELECT * FROM users WHERE username = '".mysql_real_escape_string( $username )."'" );

    $numrow = mysql_num_rows($query);

    }

    if ($numrow!=0) {

    // code to login


    }
    else
        die("That users doesn't exist!");

    else
        die("Please enter and username and password!");



?>