Callback function when there is a data packet for a task

public GearmanClient::setDataCallback(callable $callback): bool

Sets the callback function for accepting data packets for a task. The callback function should take a single argument, a GearmanTask object.

Returns true on success or false on failure.

GearmanClient::setCompleteCallback() - Set a function to be called on task completion
GearmanClient::setCreatedCallback() - Set a callback for when a task is queued
GearmanClient::setExceptionCallback() - Set a callback for worker exceptions
GearmanClient::setFailCallback() - Set callback for job failure
GearmanClient::setStatusCallback() - Set a callback for collecting task status
GearmanClient::setWarningCallback() - Set a callback for worker warnings
GearmanClient::setWorkloadCallback() - Set a callback for accepting incremental data updates

GearmanClient::setDataCallback