yes, but very unlikely. If your concerned you could compare the md5 hash and an sha1 hash on the two strings.
The chance of BOTH being the same is unimaginably small.
I wasn't planning to use it for a log in system, I was going to use it for an image upload form, to name the image.
As long as everyones username is different, and no user can upload 2 images at the same time, I planned to md5 hash the username + time.
You should be fine then :tup:
If you are really REALLY paraniod that it might happen, use microtime() instead
Yes im very paranoid when it comes to these things, though I think I gotta better idea now username + timestamp, doesnt look like i will need to hash, as long as the server allowsup to 41 characters in file names.
you can have as many characters as you need, VARCHAR allows 255 maximum