public function usePcntl()
    {
        return isset($this->usePcntl) ? ($this->hasPcntl && $this->usePcntl) : $this->hasPcntl;
    }
public function usePcntl()
    {
        return isset($this->usePcntl) ? ($this->hasPcntl && $this->usePcntl) : $this->hasPcntl;
    }
public function usePcntl ( ) { return isset ( $ this -> usePcntl ) ? ( $ this -> hasPcntl && $ this -> usePcntl ) : $ this -> hasPcntl ; }
Check whether to use Pcntl.

If `setUsePcntl` has been set to true, but Pcntl is not actually
available, this will return false.

@return bool True if the current Shell should use Pcntl
Check whether to use Pcntl .