<?php

$username = mysql_real_escape_string($_POST['username']);
$password = mysql_real_escape_string($_POST['password']);

if ($username&&password)
{
 $connect = mysql_connect("host","user","password"); or die("Couldn't connect to MySQL Database");
 mysql_select_db("dbname"); or die("Couldn't find MySQL Database");

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

$numrows = mysql_num_rows($query);





}
else
    die("Please enter a Username and a Password");

?>