Lets just say that you are writing a template program and you want to add into a array of function calls, which you can add to as well on-the-fly. Within PHP you can use a function called call_user_func which allows you to call a function using a stringed parameter in the first parameter and the next parameter(s) (if you wish to pass more than one parameter) is next. Hopefully the below will demonstrate better.
"; } ?>
and the output would be
test : codingfriends example : was here