Re: uploading a file with the same name

[Abigail-II]

That would be a very, very bad way of dealing with this problem. If two people want to upload a file with the same name at the same time, you will get problems as your program doesn't run atomically.

Keep a counter in a database, or a properly locked file and use that.

Abigail

[PhiRatE]

Or use the process ID as a portion of the name, ie image-$PID-$INCREMENTING_COUNTER, that should do the trick. So long as the operation is atomic within the PID it'll be fine (which it is).

[Abigail-II]

Not necessarely. For instance if you are using a threaded webserver in combination with mod_perl. Whether each thread inside the same process get its own PID depends on the OS.

Abigail