This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Well, this is really a PHP question, not a servlet question, but here goes.
In a JSP, the <jsp:include> standard tag performs a dispatch... but you can only dispatch to a servlet from something else (servlet or JSP) in that web container. A PHP page isn't running inside that web container (unless running under some servlet bridge). You could do something like
in your PHP page to include the output of the servlet execution in your PHP.