Hi list, I'm hoping to find a way via php, preferably without using exec() or system(), to reliably identify an ogg vorbis file via php. Using $fi = new finfo(FILEINFO_MIME); $mime_type = $fi->buffer(file_get_contents($upload)); results in 'application/ogg' My site accepts vouchers for herpetology records, but only image and audio. I do not wish to support video vouchers, but if an Ogg Theora file is uploaded, it also produces the mime type 'application/ogg' when looked at with finfo class. I need a way to distinguish ogg/vorbis from other types of ogg files, and it really needs to be w/o exec or system calls as they are currently disabled for security and I do not want to re-enable them. Is there maybe a pcre extension or something designed to look at vorbis tags that could potentially be used to verify the file is ogg vorbis? After upload I do transcode (from ogg to mp3 and mp3 to ogg so that html5 audio with flowplayer fallback works) by cron job that pulls new audio vouchers out of database, and I could (and currently do) check there, but all record submissions require at least one voucher and I would rather catch non ogg vorbis ogg files on submission before the web app creates the record in the first place. Thanks for suggestions.