event_buffer_set_callback

(PECL libevent >= 0.0.4)

event_buffer_set_callback — Set or reset callbacks for a buffered event

event_buffer_set_callback ( resource $event , mixed $readcb , mixed $writecb , mixed $errorcb [, mixed $arg ] ) : bool

Sets or changes existing callbacks for the buffered event.

event: Valid buffered event resource.
readcb: Callback to invoke where there is data to read, or NULL if no callback is desired.
writecb: Callback to invoke where the descriptor is ready for writing, or NULL if no callback is desired.
errorcb: Callback to invoke where there is an error on the descriptor, cannot be NULL.
arg: An argument that will be passed to each of the callbacks (optional).

成功时返回 TRUE，或者在失败时返回 FALSE。

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