Description:
------------
When forking off a process from PHP with the statement exec("command > /dev/null &"), the process will get killed when the httpd is closed.   

Note: This occurs even though ps is telling me that the parent process id is init (parent process id 1).


Reproduce code:
---------------
<?PHP
  
  session_write_close();  

  //Simple example to reproduce problematic forking.
  exec("ping localhost > /dev/null &");
   
?>

Expected result:
----------------
A continuous ping process should be running in the backgroud, independently of httpd.  When httpd is closed, the ping (or whatever relevant) process should keep running.

Actual result:
--------------
When httpd is closed, the ping (or whatever relevant) process dies.