How to show php widget in article pages only?

[SilverBoy]

Hi

I tried to display a PHP widget in article preview page and hide it from the layout in the section page, but I failed until now

So, any body can help me in this? and how can I pass variables to this widget? like parent section id, author name and author id for example?

Another question, how I can show any other widget like "last articles" widget in the article page only and hide it from the section page or show it in section page and hide it in the article preview page? what a specific condition I must add to the template?

Thanks in advance.