I\'m working on a PHP upload script which allows .mp3 file uploads amongst others. I\'ve created an array which specifies permitted filetypes, including mp3s, and set a maxi
MAX_FILE_SIZE is a value in Bytes
5120000 is not 500 MB. It's 5MB by my reckoning.
You'll also need to check that you're not exceeding the "post_max_size" and "upload_max_size" variables in your php.ini file
Secondly, an mp3 can be any of the following mimetypes
http://filext.com/file-extension/MP3