Well, I'm not sure if this is going to help... but I'll show you exactly what I did.
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STEP ONE: The first thing I did was create the plug-in. The settings of the plug-in are below.
Name: Whatever
Hook Location: global_start
Plug-in PHP Code:
ob_start();
include('http://site.com/file.php');
$main_xb_nav = ob_get_contents();
ob_end_clean();
Active: Yes
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STEP TWO: After that, you'll need to create the php file. Inside the file, you can basically have whatever you want. In my case, it's just html. However, I have a simple script that calls for the date. IE:
<?php echo date ('l, F dS Y'); ?>
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STEP THREE: After that, you'll need to call for the plug-in somewhere in the forums. All you need to input is the bolded part below. In my case, I used it in my header. Below is how I have it setup.
<!-- logo -->
<a name="top"></a>
<table border="0" width="$stylevar[outertablewidth]" cellpadding="0" cellspacing="0" align="center">
<tr>
<td align="center"><a href="$vboptions[forumhome].php$session[sessionurl_q]"><img src="images/logo.jpg" border
="0" alt="$vboptions[bbtitle]" /></a></td>
</tr>
</table>
<table class="navbarwrap" border="0" width="$stylevar[outertablewidth]" cellpadding="0" cellspacing="0" align="center">
<tr>
<td>
$main_xb_nav
</td>
</tr>
<tr>
<td bgcolor="#666666" height="1"></td>
</tr>
<tr>
<td bgcolor="#868686" height="5"></td>
</tr>
</table>
<!-- /logo -->
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CONC: All I did was add that little bolded part, as well as define an area for it with the row and column commands. Otherwise, that's all I needed to do. Like I said, I'm not sure if that's what you need, but that's what I did. If I'm on the right track, but you have a few questions, feel free to AIM me: xinnyburt.
It works for me just fine. The PHP is working as well.