<?php
        $con = mysql_connect("localhost","tez","cool");
        if (!$con)
        {
                die('Could not connect: ' . mysql_error());
        }
        mysql_select_db("tez_db", $con);
        $sql = "select name from login where user='$_POST["username"]' and pass='$_POST["password"]'";
        $num_rows = mysql_num_rows($sql);
        if($num_rows==0)
        {
                echo "login failed";
        }
        else
        {
                echo "welcome";
        }
        mysql_close($con)
?>