Hello friends. I have an issue regarding one of the concepts of web design.

Issue :
Let’s say you have a website where you have your database of mp3 songs. I have a similar site that doesn’t have a database but I want my site to have the same songs.
What I need are a few lines of PHP or Java script code which will allow me to link this site with the one that has database. In other words: I have a song called ABC.mp3, when the user clicks on that link, the song starts downloading into my webpage but the source will come from another site. That means I want to use another site’s resources. Is it called diverting or mirroring?
I need the script for it.

It's called hotlinking

Links in your website ought to direct to the resources of the another one - you do not have to write script for it