public function kill()
    {
        if ($this->isRunning()) {
            $processId = $this->getProcessId();

            if (OperatingSystem::isWindows()) {
                $cmd = "taskkill /pid {$processId} -t -f";
            } else {
                $cmd = "kill -9 {$processId}";
            }

            shell_exec($cmd);
        }

        return $this;
    }
public function kill()
    {
        if ($this->isRunning()) {
            $processId = $this->getProcessId();

            if (OperatingSystem::isWindows()) {
                $cmd = "taskkill /pid {$processId} -t -f";
            } else {
                $cmd = "kill -9 {$processId}";
            }

            shell_exec($cmd);
        }

        return $this;
    }
public function kill ( ) { if ( $ this -> isRunning ( ) ) { $ processId = $ this -> getProcessId ( ) ; if ( OperatingSystem :: isWindows ( ) ) { $ cmd = "taskkill /pid {$processId} -t -f" ; } else { $ cmd = "kill -9 {$processId}" ; } shell_exec ( $ cmd ) ; } return $ this ; }
Kill the current operation process if it is running.

@return self
Kill the current operation process if it is running .