dovecot - Oct 2010 - post-login scripting using PHP

I'd like to write post-login script using PHP. I noticed every shell 
post-login script ends with: exec "$@", which effectively executes 
dovecot's script-login.

However, while I try to do the same (?) in PHP: $prog = $argv[1]; exec 
("$prog"); it doesn't work. The client timeouts, dovecot (2.0.6)
says
"Disconnected for inactivity".

May be I don't clearly see the way post-login scripting should work. Any 
hint to make it done?

Regards,

MU

On Tue, 2010-10-26 at 16:00 +0200, Maciej Uhlig wrote:
> I'd like to write post-login script using PHP. I noticed every shell 
> post-login script ends with: exec "$@", which effectively
executes
> dovecot's script-login.
$@ is all parameters.
> However, while I try to do the same (?) in PHP: $prog = $argv[1]; exec 
> ("$prog"); it doesn't work. 
Here you're executing the program, but not giving it any parameters from
$argv[2] etc. I don't know what is the correct way to do that in PHP.