change the text of a page on submitting a form on another page

newbie271

Hi
I have a very basic question. Is it possible to change the text of a page after submitting a form on another page?
A particular example is given as under:

I have a login link on 'index.php' page, and when it is clicked, a new (_blank) page 'login.php' opens. This page contain a form having username and password. When a user submit the form, another page authenticate the user.

If the user is a valid user, then I need to display "Welcome username" on 'index.php' page, dynamically.

I added the code below. What I need to add to accomplish this?

index.php

    <?php
    if ($_COOKIE['cookieName']) { echo '<li>Welcome '. $_COOKIE['cookieName']; echo'|'; echo '<a href="logout.php" target="_blank">Logout</a> </li>';  }
    else {echo' <li><a href="login.php" target="_blank" class="login">Login</a> | <a href="user_add.php" target="_blank" class="login">Register</a></li> '; }
    ?>

    <form action="checklogin.php" method="post" name="form" id="form">
       	<input type="text" name="username" value = '' />       

        <input type="password" name="password" value = '' />
    <input name="submit" type="submit" value="Log me in." class="button"/>

checklogin.php

    $sql="SELECT * FROM users WHERE username='$username' and password='$password'";
    $result=mysql_query($sql);
    // Mysql_num_row is counting table rows
    $count=mysql_num_rows($result);
    if($count==1){
    $cookie_name ="$cookiename";
    $cookie_expire ="300";
    setcookie($cookie_name,$cookie_value,time() + (300),"/", $cookie_domain);
    header("location:$successfulLogin_url");

//I need some code here that somehow change the text in the index.php file dynamically

}

else{
header("location:$failedLogin_url");
}

Thanks in advance

Weedpacket

//I need some code here that somehow change the text in the index.php file dynamically

Not there, because it usually wouldn't be seen (the browse will redirect to $successfulLogin_url instead). You'd have the code in the index.php script. I.e.,

 <?php
    if ($_COOKIE['cookieName']) { echo '<li>Welcome '. $_COOKIE['cookieName']; echo'|'; echo '<a href="logout.php" target="_blank">Logout</a> </li>';  }
    else {echo' <li><a href="login.php" target="_blank" class="login">Login</a> | <a href="user_add.php" target="_blank" class="login">Register</a></li> '; }
    ?>

In other words, that part is right. The part that looks like it would cause problems is when you're setting up the cookie:

    $cookie_name ="$cookiename";
    $cookie_expire ="300";
    setcookie($cookie_name,$cookie_value,time() + (300),"/", $cookie_domain);

I don't see where $cookiename (which I'm guessing is supposed to contain the value "cookieName") or $cookie_value (which I'm guessing is supposed to be the name of the user who logged in) are getting set.