Setting MAX Upload Size
Defalut max value of “POST” in PHP4.3.x is 8MB and max of upload file size is 2MB. If you want to upload your stuff comfortably, I recommend to increase the size of these. To make this work, rewrite your “/usr/local/lib/php.ini” file on your server machine like:

Line 310

post_max_size = 8M

Line 378

upload_max_filesize = 2M

to

post_max_size = 100M

upload_max_filesize = 100M

and then reboot the server software. If you are not allowed to modify php.ini, ask your system admin for more info.