'while'-like user functions in a module?

Hi! Is it possible to create a user-defined function in a module that does something like this: $i=0; module_loop($i) { // repeats this X times echo module_echo(); } ? And if so, how do I do it? And if it is possible, can I also create something like module_loop($i) { echo module_echo(); } else { echo "module_loop failed for some reason, so I will do something else"; } Cheerio, Marc (prepared to be disappointed :-)