How to run multiple commands in system, exec or shell_exec?

Question

I\'m trying to run shell command like this from php:

ls -a | grep mydir

But php only uses the first command. Is there any way to force php to p

Answer 1

http://www.php.net/manual/en/function.proc-open.php

First open ls -a read the output, store it in a var, then open grep mydir write the output that you have stored from ls -a then read again the new output.

L.E.: