(PECL libevent >= 0.0.1)
event_buffer_write — Write data to a buffered event
$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.