Web Users: Simple Question

Simple question:

I’m using web users. I want to use php inside of my pages for custom code. I want to be able to know if someone is logged in. For example, if someone is logged in I want to display their information. How can I use php inside of my pages and how do I check to see if someone is logged in? I tried using

[tt]<?php
echo getLoginUserName( );
?>[/tt]

in one of my pages but the php wasn’t parsed. Please help. Thanks!

PHP needs to be put in a snippet to be rendered.

There are a few snippets that will provide the user info placeholders. Here is one (I have not tested this yet):
http://modxcms.com/UserPlaceholders-1596.html

I have also seen one that will display a chunk if logged in but I can’t remember the mane at the moment.

Thanks dev_cw. I had just figured this out. You have to use snippets to do PHP and the API functions need to start with $modx->. So, I created a new snippet that looks like this and it works:

[tt]
<?php
echo $modx->getLoginUserName( );
?>
[/tt]