PHP Manual: Constructs EvStat watcher object

Description

public EvStat::__construct ( string $path , double $interval , callable $callback [, mixed $data = NULL [, int $priority = 0 ]] )

Constructs EvStat watcher object and starts the watcher automatically.

Parameters

path: The path to wait for status changes on.
interval: 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.
callback: See Watcher callbacks .
data: Custom data associated with the watcher.
priority: Watcher priority

Return Values

Returns EvStat watcher object on succes.

Examples

Example #1 Monitor changes of /var/log/messages


<?php
// Use 10 second update interval.
$w = new EvStat("/var/log/messages", 8, function ($w) {
 echo "/var/log/messages changed\n";

 $attr = $w->attr();

 if ($attr['nlink']) {
  printf("Current size: %ld\n", $attr['size']);
  printf("Current atime: %ld\n", $attr['atime']);
  printf("Current mtime: %ld\n", $attr['mtime']);
 } else {
  fprintf(STDERR, "`messages` file is not there!");
  $w->stop();
 }
});

Ev::run();
?>