PHP 7.4.25 Released!

Zookeeper::get

(PECL zookeeper >= 0.1.0)

Zookeeper::getGets the data associated with a node synchronously

Description

public Zookeeper::get(
    string $path,
    callable $watcher_cb = null,
    array &$stat = null,
    int $max_size = 0
): string

Liste de param├Ętres

path

The name of the node. Expressed as a file name with slashes separating ancestors of the node.

watcher_cb

If nonzero, a watch will be set at the server to notify the client if the node changes.

stat

If not NULL, will hold the value of stat for the path on return.

max_size

Max size of the data. If 0 is used, this method will return the whole data.

Valeurs de retour

Returns the data on success, and false on failure.

Erreurs / Exceptions

This method emits PHP error/warning when parameters count or types are wrong or fail to get value from node.

Attention

Since version 0.3.0, this method emits ZookeeperException and it's derivatives.

Exemples

Exemple #1 Zookeeper::get() example

Get value from node.

<?php
$zookeeper 
= new Zookeeper('locahost:2181');
$path '/path/to/node';
$value 'nodevalue';
$zookeeper->set($path$value);

$r $zookeeper->get($path);
if (
$r)
  echo 
$r;
else
  echo 
'ERR';
?>

L'exemple ci-dessus va afficher :

nodevalue

Exemple #2 Zookeeper::get() stat example

Get node stat info.

<?php
$zookeeper 
= new Zookeeper('localhost:2181');
$path '/path/to/node';
$stat = [];
$zookeeper->get($pathnull$stat);
var_dump($stat);
?>

L'exemple ci-dessus va afficher :

array(11) {
  ["czxid"]=>
  float(0)
  ["mzxid"]=>
  float(0)
  ["ctime"]=>
  float(0)
  ["mtime"]=>
  float(0)
  ["version"]=>
  int(0)
  ["cversion"]=>
  int(-2)
  ["aversion"]=>
  int(0)
  ["ephemeralOwner"]=>
  float(0)
  ["dataLength"]=>
  int(0)
  ["numChildren"]=>
  int(2)
  ["pzxid"]=>
  float(0)
}

Voir aussi

add a note add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top