GearmanClient::setWarningCallback
 (PECL gearman >= 0.5.0)
  GearmanClient::setWarningCallback — Set a callback for worker warnings 
    说明
  public bool  GearmanClient::setWarningCallback 
    (   callable  $callback 
   )
     参数
  
-  callback
-  
       A function to call
       
   返回值
 
   成功时返回  TRUE , 或者在失败时返回  FALSE 。
  
    参见
  
-   GearmanClient::setDataCallback() - Callback function when there is a data packet for a task 
-   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::setWorkloadCallback() - Set a callback for accepting incremental data updates