I am on a unix system and I am developing a web page where using php I have a person upload a file and then I modify the file by calling a program with the name of the file that the person has uploaded as an argument. The problem that I am having is that I don't know how to have php make a call to the system for it to run the application with the file. Does any one know how to have php make a call to run an application? Any help would be great.
Josh
