PHP in Templates and Template Conditionals

[kerrywano]

Ugh... I don't have a clue what I'm doing...
I got the plugin installed and activated.

What I want to do:
Disable the Member List and Calendar links unless the user is logged in; guests should not see these links.

I realize I need to edit the 'header' template, as I see the links there. I just don't know what code to insert to check if a user is logged in or not...

Thanks,
Kerry Wano

"True friends stab you in the front." - Oscar Wilde