PHP output during longer program run times

Lets say i have a script that runs for a longer period of time, 1-10 minutes. Id like the script to give output as to what it is doing while it runs, but the problem is, that it wont print output on runtime, but it will output everything at the same time after it has completed the whole job. Even if i let it to print something out on the first line. Any workaround for this? running php 3.0.12 installed as apache module