(PECL gearman >= 0.6.0)
GearmanJob::sendStatus — Send status
$numerator, int $denominator): boolSends status information to the job server and any listening clients. Use this to specify what percentage of the job has been completed.
numeratorThe numerator of the precentage completed expressed as a fraction.
denominatorThe denominator of the precentage completed expressed as a fraction.
成功时返回 true， 或者在失败时返回 false。