Creating a custom login form, a problem, please help!

[Sion]

I have made an include called authusers.php which I will be calling on everypage to check if the user is auth'd or not on my whole site (non-vB pages too). This is so I can display unique content to my visitors...

Here is the code up to now:

PHP Code:

<?php //authusers.php

//include global.php
$curdir = getcwd ();
chdir('/home/sion/public_html/forums/');
include_once ('global.php');
chdir ($curdir);


// check if logged in
if ($bbuserinfo['userid']== 0) {
?>
<table border="0" cellpadding="0" cellspacing="0">
<form action="member.php" method="post">
<tr>
    <td nowrap><smallfont><b>Not cookied?</b><br>Login with username and password:</smallfont></td>
</tr><tr>
    <td nowrap><input type="hidden" name="s" value="$session[sessionhash]">
    <input type="hidden" name="action" value="login">
    <input type="text" class="bginput" name="username" size="7">
    <input type="password" class="bginput" name="password" size="7">
    <input type="submit" class="bginput" value="Login!"></td>
</tr>
</form>
</table>
<?php
} else {
  echo 'you are logged in';
}
?>

I've just put the echo 'you are logged in'; to test if the script actually works, which it does.

This is what I'm trying to achieve: I include this php file in every page, and if the user is logged in, then it shows the rest of the page (eg. membersonly.php), otherwise (if the user is a guest) it only shows the login form above.

I hope you understand what I mean, ask me any Qs if anything needs clarifying.

Thanks in advance!

--Sion---