(PECL gearman >= 0.5.0)
GearmanClient::addTaskHighBackground — Add a high priority background task to be run in parallel
$function_name
   , string $workload
   [, mixed &$context
   [, string $unique
  ]] )Adds a high priority background task to be run in parallel with other tasks. Call this method for all the tasks to be run in parallel, then call GearmanClient::runTasks() to perform the work. Tasks with a high priority will be selected from the queue before those of normal or low priority.
function_nameLa funzione che il worker deve eseguire
workloadI dati serializzati da processare
contextContesto applicativo da associare con un task
uniqueUn ID unico che identifica un particolare task
   A GearmanTask object or FALSE if the task could not be added.