How can I execute a Java program within a php script?

Question

I am writing a simple web upload script. The goal is to upload a file using php, and then calling a java program to process this file.
I have done the work for uploading

Answer 1

It's possible it has to do with the path that the exec is defaulting to. You may need to explicitly define your classpath with an absolute path to your .class or jar files when calling java.