If you mean an audio recorder that saves to a remote server, you'll need either client-side scripting paired with that (AJAX, JAVA, maybe flash), or have the user upload it after it's been recorded (.wav, .mp3, etc..).
php it self no ... even when using flash its not something easy , you will need Flash Media Server and codecs .. goood luck
ASP.NET cant record .. you will need to use something like activeX maybe where the user download a program to his pc and then could maybe download . php doesnt at all . the only way as mentioned is FLASH and its not easy at all . i'll post the site i found where they give such services but its not free ... (if i find the site again)
you should be able to do it ... facebook lets you do it so i would think you could do it in flash... but i know php doesnt have that type of client side ability....
Though someday php will be capable. There is an interesting project out there with the goal of allowing the creation of Windows Apps via php. Someday this great coding language will be perfecto. I think most Windoze coders I know would use VB, but I am not sure, I just do Linux type coding.
i know someone has made a program for windows called phpcompile and supposedly you can write programs in php and then it will compile it to run as an exe in windows... i havent tried it but this isnt what the post is about anyway...