compile php

i have a script that checks an email account and records information into a database and want to call it when ever an email hits that account. My ISP uses merak mail server and i see it has an excutables section, so i was hoping to fire my php page whenever an email goes to the account. the problem is that it can only execute .exe or .dll files and i don't know if a php file can be compiled. Thanks in advance, ~Logan