How to use compile_template function?

[EWGF]

Yes. I have made a simple cms -for outside the forum directory- with some custom tables, but the content in those custom tables can't use conditions and other php functions (the codes show up unparsed in the HTML output). According to vb.com I need to use the compile_template() function for this to work and I'm having trouble to get this function working.

Database content:

PHP Code:

<if condition="$show[member]">Not viewable for guests</if> 


HTML output getting unparsed:

PHP Code:

<if condition="$show[member]">Not viewable for guests</if>