   #PHP Manual Program Execution functions passthru proc_get_status

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                                  proc_close

   (PHP 4 >= 4.3.0)
   proc_close --  Close a process opened by proc_open() and return the
   exit code of that process.

Description

   int proc_close ( resource process)

   proc_close() is similar to pclose() except that it only works on
   processes opened by proc_open(). proc_close() waits for the process to
   terminate, and returns it's exit code. If you have open pipes to that
   process, you should fclose() them prior to calling this function in
   order to avoid a deadlock - the child process may not be able to exit
   while the pipes are open.
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