As suggested in part 1 of this series of tutorials, a PHP based template system can use PHP commands or keywords. Here we'll tackle the same task as before but this time we'll use keywords instead of PHP functions. The tricky part about this is that we have to "parse" the template instead of simply including it in the handler script!
This system is much more complex and is really only suggested when you want someone other than yourself to create templates. The first thing you should do when creating a template based website using PHP with keywords is to decide on the exact method of keyword implementation! You have to make the keywords easy enough for anyone to use but unique enough to keep the script from confusing regular content or words with keywords. Some little used non-alphanumeric character and/or all capital letters is one method while a prfix and underscore is another. For example:
{KEYWORD1}
{KEYWORD2}
or
[temp_menu]
[temp_header]
[temp_footer]
or
%_MY_MENU_%
%_MY_FOOTER_%
%_MY_HEADER_%

By making the keyword syntax rules early, you can avoid complications later.

The only files that we have to change for the keyword system are template.php and the handler (index.php, content1.php) files. The other files will remain unchanged and copies of all can be found below:

Simple HTML Template Sample 1 - Keywords

Notice that we have replaced all of the PHP echo commands with keywords in curly brackets {}.
Since this file doesn't have any PHP in it, you could give it a .txt, .html, or any other file extrension.

Simple main_menu.php Sample 1 - Keywords

Notice that this file is unchanged from part 1.

Simple header.php Sample 1 - Keywords

Notice that this file is unchanged from part 1.

Simple footer.php Sample 1 - Keywords

Notice that this file is unchanged from part 1.

Simple index.php Sample 1 - Keywords

This file has had extensive changes made to it.

Simple content1.php Sample 1 - Keywords

This file has had extensive changes made to it.

These files will output the following: