(PECL ev >= 0.2.0)
EvPrepare::__construct — Constructs EvPrepare watcher object
$callback
   
   [, 
    string
     $data
   
   [, 
    string
     $priority
   
  ]] )Constructs EvPrepare watcher object. And starts the watcher automatically. If need a stopped watcher consider using EvPrepare::createStopped()
callback
    See Watcher callbacks .
data
    Custom data associated with the watcher.
priority
    Returns EvPrepare object on success.