# EvStat::__construct

(PECL ev >= 0.2.0)

EvStat::__construct — Constructs EvStat watcher object

### Beschreibung

public EvStat::__construct(
string `$path` ,
float `$interval` ,
callable `$callback` ,
mixed `$data` = `null` ,
int `$priority` = 0
)

Constructs EvStat watcher object and starts the watcher automatically.

### Parameter-Liste

`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

### Beispiele

Beispiel #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();
}
});
?>`
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