Sending data to persistent process stdin

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Hello readers,

I have been thinking of making a simple web-based interface to control my media center box (running debian linux). Being a bit enthustiatic, I thought I could use some generic tools for playing media files and write the whole UI by my own.

I found mpg123 program that can be run in "remote mode" (mpg123 -R) so that playback can be controlled via stdin. Writing "LOAD <mp3 file>" to the stdin will begin output, "PAUSE" will stop it and so on.

How could I use PHP and its process functions to send something to stdin of a persistent process? I would like to run mpg123 only once, whichafter a few PHP scripts would send data and proper commands to its stdin. Maybe a kind of daemon process would be needed? Anyway, sending data to a daemon can be problematic... Maybe a kind of socket wrapper? Well - I have no experience about socket functions of PHP...

Tips and tricks are welcome, or should I just go to the local hi-tech market and by a CD player LOL :D

Thanks,
Ville

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