Generating executable code

Currently, I have an XML file that I load in, parse manually and iterate through the nodes to create objects, etc, using the node values as parameters. This works all well and fine but is a little resource intensive. Now, I can create a XSL template to transform the XML file and output all the PHP code that we are doing manually. However, when the transformation occurs, the result is pretty much just a string as far as PHP is concerned; it isn't executable PHP code. I know I can output the result to a temporary file then include it or I can pass the result to eval() to execute the code, but neither is ideal. Is there another way I can do what I need? Is there a way to 'include' (for the lack of a better term) the result of the XSL transformation such that PHP processes it as it would any other source code? thnx, Chris