What is the difference between include and parsedinclude

What is the difference between using

   <?php include("filename.inc"); ?>  

and

    <%parsedinclude(filename.inc)%> 

Both work, but I'm curious about the < ? and < % convention, and this is a hard question to phrase for Google.

And also the difference between php include and parsedinclude

To answer your first question, <?php is the normal PHP open tag while <% is a variant of it that is used in Nucleus CMS (an open-source blog management software package written in PHP).

Regarding the second question, parsedinclude is a function in Nucleus CMS, and is not valid in normal PHP.

Function of parsedinclude: (quoted from Nucleus CMS Documentation)

Includes a file into the output. The contents of the file is parsed by the Nucleus skin/template parser, so you can use skin/templatevars. (see phpinclude and include for other include options)

Function is include: (quoted from Nucleus CMS Documentation)

Includes a textfile into the output. The contents of the file is not parsed in any way, so you cannot use skin/templatevars or use PHP code (see parsedinclude and phpinclude if you want parsed includes)