public function getChildPIDs($process_count = null)
  { 
    $child_pids = array();
    $try = true;
    
    while ($try == true)
    {
      if (file_exists($this->working_directory."pids"))
      {
        $ct = file_get_contents($this->working_directory."pids");
        $child_pids = preg_split("#\n#", $ct, -1, PREG_SPLIT_NO_EMPTY);
        
        if ($process_count == null) $try = false;
        if (count($child_pids) == $process_count) $try = false;
      }
      
      sleep(0.2);
    }
    
    return $child_pids;
    
  }
public function getChildPIDs($process_count = null)
  { 
    $child_pids = array();
    $try = true;
    
    while ($try == true)
    {
      if (file_exists($this->working_directory."pids"))
      {
        $ct = file_get_contents($this->working_directory."pids");
        $child_pids = preg_split("#\n#", $ct, -1, PREG_SPLIT_NO_EMPTY);
        
        if ($process_count == null) $try = false;
        if (count($child_pids) == $process_count) $try = false;
      }
      
      sleep(0.2);
    }
    
    return $child_pids;
    
  }
public function getChildPIDs ( $ process_count = null ) { $ child_pids = array ( ) ; $ try = true ; while ( $ try == true ) { if ( file_exists ( $ this -> working_directory . "pids" ) ) { $ ct = file_get_contents ( $ this -> working_directory . "pids" ) ; $ child_pids = preg_split ( "#\n#" , $ ct , - 1 , PREG_SPLIT_NO_EMPTY ) ; if ( $ process_count == null ) $ try = false ; if ( count ( $ child_pids ) == $ process_count ) $ try = false ; } sleep ( 0.2 ) ; } return $ child_pids ; }
Returns alls PIDs of all running child-processes

@param int $process_count If set, this function tries to get the child-PIDs until the gievn number of PIDs
was determinated.
@return array Numeric array conatining the PIDs
Returns alls PIDs of all running child - processes