(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