Thanks for your reply.
Maybe the example looks a bit weird because i deleted all code that isnt necessary to show my problem.
I want to use threads cause i feel the communication is easier than with processes. If i create process and a pipe for communication this would result in something like 
while (..) {
  $tmp = <READ_FROM_OTHER_PROCESS>
}

[download]
which blocks one of my processes.
I tried the ipc forks library instead of threads and it works fine.

In reply to Re^2: Redirecting stdout with threads by michi
in thread Redirecting stdout with threads by michi

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