(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
Başarı durumunda TRUE, başarısızlık durumunda FALSE döner.