Description:
------------
I try to use php built-in to run some shell command like: apachectl restart

But I find that, if i start a new process by using exec()/passthru()/shell_exec() funcion, the http request will never close until I kill the process started in php .

I‘ve already tried to append "> /dev/null 2>&1 &"  to the command (as test1.php below)
or but the command to a shell script (as test2.php and ping.sh below)

but the http request still not close before the process ends.

It's ok to run the same code under Apache or pure php cli.
So I think it should be a bug of the php built-in web server, hope someone can fix it~

Test script:
---------------
test1.php:
  <?php
    exec('ping -c 100 google.com > /dev/null 2>&1 &',$output, $code);
    var_dump($output,$code);
  ?>
--------------------------------------
test2.php:
  <?php
    exec('ping.sh',$output, $code);
    var_dump($output,$code);
  ?>
ping.sh:
  #!/bin/bash
  ping -c 100 google.com > /dev/null 2>&1 &