(PECL gearman >= 0.5.0)
GearmanClient::doLowBackground — Run a low priority task in the background
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 take precedence over low priority tasks in the job queue.
A registered function the worker is to execute
Serialized data to be processed
A unique ID used to identify a particular task
The job handle for the submitted task.