Thank you for your ideas. Unfortunately I have already explored them. Yahoo indicates they do allow uploads via php programs and I have already checked to make sure I have the MAX_FILE_SIZE form input and the enctype multipart/form-data set correctly. However, I do plan to try the var_dump($_FILES) suggested by Wilku above to see if I can come up with anything.
I installed the programs onto another server and they work perfectly. At this point it appears to be one of two things:
- Yahoo really does NOT allow file uploads ... or ...
- There is a difference in the php configurations.
I have a support request into Yahoo to see if they can figure it out. I'll post any resolutions to this thread if it turns out to be a configuration or coding problem.