PHP exec output

We encountered a random problem while trying to execute a program via the PHP exec command and trying to capture the output of the executed program; we always retrieved an empty String.

This is due to not using the default I/O buffer. You have to tell the shell which output buffer to use. This can be simply done by appending "2>&1" to the command.

exec($command, $output); ->
exec($command." 2>&1", $output);

et voilà, the output array variable should not be an empty string anymore.

Hope this helps.

Bests,
Charly