I tried searching for this and receivied a lot of results that were not what I was looking for. If already is a post, can someone please point me there. If not can someone help me out with my question.
The question is - I want a script to execute when another file is present. An example of what I am looking for is that a client would upload a text file. When this file is present the PHP script would execute doing what it needs to do.
Thanks in advance - I hope I made myself clear.