Echo Error Message for Incorrect Login

Hi,
I am having default.php and checklogin.php page.
When i login from default.php, it checks for correct login from checklogin .php.
When the login is correct, checklogin.php redirects to other page.
But if it is wrong, the page redirects to default.php page and here i want to echo as Incorrect Login.
I am already having Javascript Validation in default.php.

you can either:

• set a query string variable
• set a cookie
• or set a session

that says the login was incorrect. then, check if this query string/cookie/session exists on your main page and display an error message if so.

Ya Thankyou, which is the best one for displaying more errors..

it doesn't matter, that's why I gave you three different options.

Hi,
I used the sessions method, but it has some errors. Each and every time when the page loads the "Invalid Login" error message is displayed, even when the page is not posted to check the login.
checklogin.php coding

Code:

---

if($hash != $userdata['userpwd'])       
        {
                $_SESSION['ErrorLogin'] = "Invalid Login";
            header('Location: ../default.php');
            //echo "Fails";
        }

---

login.php coding

Code:

---

<?PHP
session_start();
if (isset($_SESSION['ErrorLogin']))
{
        $error = $_SESSION['ErrorLogin'];                                                                                       
echo "$error";
}

---

After you print it, you need to clear the session variable, otherwise it will stay set for as long as the session exists.

Code:

---

<?php
session_start();
if (isset($_SESSION['ErrorLogin']))
{
        $error = $_SESSION['ErrorLogin'];                                                                                       
        echo "$error";
        unset($_SESSION['ErrorLogin']);
}

---