Service/GearmanClient.php
public function doLowBackgroundJob($name, $params = '', $unique = null)
    {
        return $this->enqueue($name, $params, GearmanMethods::GEARMAN_METHOD_DOLOWBACKGROUND, $unique);
    }
public function doLowBackgroundJob($name, $params = '', $unique = null)
    {
        return $this->enqueue($name, $params, GearmanMethods::GEARMAN_METHOD_DOLOWBACKGROUND, $unique);
    }
public function doLowBackgroundJob ( $ name , $ params = '' , $ unique = null ) { return $ this -> enqueue ( $ name , $ params , GearmanMethods :: GEARMAN_METHOD_DOLOWBACKGROUND , $ unique ) ; }
Runs a low priority task in the background, returning a job handle which
can be used to get the status of the running task.

Normal and high priority tasks will get precedence over low priority
tasks in the job queue.

@param string $name   A GearmanBundle registered function the worker is to execute
@param string $params Parameters to send to job as string
@param string $unique A unique ID used to identify a particular task

@return string The job handle for the submitted task.
Runs a low priority task in the background returning a job handle which can be used to get the status of the running task .