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

event_buffer_set_callbackSet or reset callbacks for a 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).