(PECL gearman >= 0.5.0) Clear all task callback functions

(PECL gearman >= 0.5.0) Run a single high priority task

(PECL gearman >= 0.5.0) Returns an error string for the last error encountered.

(PECL gearman >= 0.5.0) Get the status for the running task

(PECL gearman >= 0.5.0) Run a list of tasks in parallel

(PECL gearman >= 0.5.0) Add a low priority background task to be run in parallel

(PECL gearman >= 0.5.0) Set a function to be called on task completion

(PECL gearman >= 0.5.0) Set a callback for worker warnings

(PECL gearman >= 0.5.0) Add a list of job servers to the client

(PECL gearman >= 0.6.0) Set application context