This section walks through a simple (and tragically pointless) application to demonstrate common usage of the PHPEmbed library. This example will work specifically with the php_stl object since it includes all the functionality in the library, but using the php object (which doesn't use the STL) would work similarly. References to specific functions or code will be typeset in courier font. Additionally, please note that going forward references to the PHPEmbed libraries and their specific instances will be indicated by lowercase courier font (php) and the actual programming language, code written in that language, and the interpreter for that language will be indicated with normal upper case font (PHP). So, for example, php functions are the member methods belonging to the php class written in C++ and defined in php_cxx.h while PHP functions are methods written in the PHP programming language and evaluated by the PHP interpreter.