(PECL libevent >= 0.0.1)
event_buffer_write — Write data to a buffered event
bool event_buffer_write ( resource $bevent , string $data [, int $data_size = -1 ] )
Writes data to the specified buffered event. The data is appended to the output buffer and written to the descriptor when it becomes available for writing.
bevent
Valid buffered event resource.
data
The data to be written.
data_size
Optional size parameter. event_buffer_write() writes all the data by default.
event_buffer_write() returns TRUE on success or FALSE on error.
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https://secure.php.net/manual/en/function.event-buffer-write.php