compare files

[sidsel]

I have a site with galleries where people can upload pictures by themselves.

I want to avoid people submitting the same picture twice. I have thought about comparing the filesize and/or the image width/height.

But how do I do that if I lets say have all the uploaded files filesize (and maybe also width & height) in an array?

Or are there any better solutions?

[drew010]

you can use [man]md5_file()[/man] to compare the pictures, if you are trying to check for identical ones, is a bit better than trying to compare dimensions/filesize of them all.