How to play music?

[Jimbo33]

Hi guys, I need to know how to get a song playing online.
I tried a few things but none would work. Then thinking my folder configuration was wrong, making the song i uploaded unreadable, i tried with graalmain.mid. But still not working. Here's what I tried can anyone fix it to make it work? Plz.

PHP Code:

//#CLIENTSIDE
function onPlayerEnters(){
play("graalmain.mid");
}