Contrary to the documentation, this callback accepts an instance of \GearmanTask, not \GearmanClient.
(PECL gearman >= 0.5.0)
GearmanClient::setCreatedCallback — Set a callback for when a task is queued
Sets a function to be called when a task is received and queued by the Gearman job server. The callback should accept a single argument, a GearmanClient oject.
A function to call
TRUE în cazul
FALSE în cazul eșecului.