(PECL ev >= 0.2.0)
EvLoop::prepare — Creates EvPrepare watcher object associated with the current event loop instance
$callback
   
   [, 
    mixed
     $data
     = NULL
   
   [, 
    int
     $priority
     = 0
   
  ]] )Creates EvPrepare watcher object associated with the current event loop instance
All parameters have the same maening as for EvPrepare()
Returns EvPrepare object on success