set user & group quota; fork or multithreading?

Hello, I am currently trying to find a way to: set user and group quota using PHP. I don'T know how I could use the existing edquota programs, etc, because they automatically open vi to edit instead of taking one line command. I would also like to know if anyone has any ideas on how to do multithreading in PHP? I thought of using a script with a function executed once the script is over, multiple times... would that work? Please, I would really appreciate some ideas, tips on these 2 subjects!! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Félix C.Courtemanche . scorpionc@scorpionc.com Co-Administrator . http://www.can-host.com/ Head Designer . http://www.can-design.com/ .