php man page for evstat

EVSTAT(3)								 1								 EVSTAT(3)

The EvStat class

INTRODUCTION
       EvStat  monitors  a  file  system  path	for attribute changes. It calls stat() on that path in regular intervals(or when the OS signals it
       changed) and sees if it changed compared to the last time, invoking the callback if it did.

	The path does not need to exist: changing from "path exists" to "path does not exist" is a status change like  any  other.  The  condition
       "path does not exist" is signified by the 'nlink' item being 0(returned by EvStat::attr method).

	The  path must not end in a slash or contain special components such as '.' or .. . The path should be absolute: if it is relative and the
       working directory changes, then the behaviour is undefined.

	Since there is no portable change notification interface available, the portable implementation simply calls stat() regularly on the  path
       to  see	if  it	changed somehow. For this case a recommended polling interval can be specified. If one specifies a polling interval of 0.0
       (highly recommended) then a suitable, unspecified default value will be used(which could be expected to be around 5 seconds, although  this
       might change dynamically).  libev will also impose a minimum interval which is currently around 0.1 , but that's usually overkill.

	This  watcher  type  is  not  meant  for  massive  numbers of EvStat watchers, as even with OS-supported change notifications, this can be
       resource-intensive.

CLASS SYNOPSIS
       EvStat

       EvStatextends
       EvWatcher

       Properties

       o public$path

       o public$interval

       Inherited properties

       o public$is_active

       o public$data

       o public$is_pending

       o public$priority

       Methods

       o public array EvStat::attr (void  )

       o public EvStat::__construct NULL (string  $path, double  $interval, callable  $callback, [mixed  $data], [int  $priority])

       o finalpublicstatic void EvStat::createStopped NULL (string  $path, double  $interval, callable	$callback, [mixed  $data],  [int   $prior-
	 ity])

       o public void EvStat::prev (void  )

       o public void EvStat::set (string  $path, double  $interval)

       o public bool EvStat::stat (void  )

       Inherited methods

       o public int EvWatcher::clear (void  )

       o abstractpublic EvWatcher::__construct (void  )

       o public void EvWatcher::feed (int  $revents)

       o public EvLoop EvWatcher::getLoop (void  )

       o public void EvWatcher::invoke (int  $revents)

       o public bool EvWatcher::keepalive ([bool  $value])

       o public void EvWatcher::setCallback (callable  $callback)

       o public void EvWatcher::start (void  )

       o public void EvWatcher::stop (void  )

PROPERTIES
	      o $interval
		- Readonly . Hint on how quickly a change is expected to be detected and should normally be specified as 0.0 to let libev choose a
		suitable value.

	      o $path
		- Readonly . The path to wait for status changes on.

PHP Documentation Group 														 EVSTAT(3)