upload_max_file_size 1,000
post_max_size 2,500
means: you can upload a file with a size of max 1,000 byte
total size of data you submit (meaning file and text entered in form like username, password, description of file, ...) may not exceed 2,500
so ou can enter 1,500 byte of text into a textarea if you upload a 1,00 byte file or enter 2,500 byte text into a textarea if you don't uplad anything
better?