PHP Manual: Constructs EvStat watcher object

Description

public EvStat::__construct(
     string $path ,
     float $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

Examples

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

<?php

// Use 10 second update interval.
$w = new EvStat("/var/log/messages", 10, function ($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();
    }
});

?>