ID: 10744
Updated by: derick
Old-Status: Open
Status: Closed
Bug Type: *Session related
Operating system: 
PHP Version: 4.0.4pl1
Assigned To: 

That is by design (for file based session storage at least).

See and

All access to session variables in PHP4 is serialized. If you want to
start some daemon from inside your php script make it to close all
unused file handles at startup or close the session before exec().


Previous Comments:

[2001-05-09 04:39:31] [EMAIL PROTECTED]
Try this in a script:
  exec( "/bin/sleep 30 >/dev/null 2>&1 </dev/null &" ) ;
  echo "Done !!" ;

Now call it from the browser several time (Reload button). If you type a ps ax command 
you will see several "sleep 30" processes. Wait all the processes to stop.

Now put session_start() as the first line. Press RELOAD: it completes OK. Now press 
RELOAD again: it hangs !!! It waits for the sleep to terminate before starting the 
next !! So if you press RELOAD 10 times you need to wait 300 seconds !!

Is it a normal behaviour ? How can I have a process completely in the background ? 

PS: I tried to put the nohup in the exec string with no success 


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