Specify application credentials

# Zookeeper::addAuth

(PECL zookeeper >= 0.1.0)

Zookeeper::addAuth — Specify application credentials

### 説明

public function Zookeeper::addAuth(string `$scheme`, string `$cert`, callable `$completion_cb` = `null`): bool

The application calls this function to specify its credentials for purposes of authentication. The server will use the security provider specified by the scheme parameter to authenticate the client connection. If the authentication request has failed: - the server connection is dropped. - the watcher is called with the ZOO_AUTH_FAILED_STATE value as the state parameter.

### パラメータ

`scheme`

  The id of authentication scheme. Natively supported: "digest" password-based authentication

`cert`

  Application credentials. The actual value depends on the scheme.

`completion_cb`

  The routine to invoke when the request completes. One of the following result codes may be passed into the completion callback: - ZOK operation completed successfully - ZAUTHFAILED authentication failed

### 戻り値

成功した場合に `true` を、失敗した場合に `false` を返します。

### エラー / 例外

This method emits PHP error/warning when parameters count or types are wrong or operation fails.

警告

Since version 0.3.0, this method emits ZookeeperException and its derivatives.

### 例

例1 Zookeeper::addAuth() example

Add auth before requesting node value.

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

    $zookeeper->addAuth('digest', 'user0:passwd0');
    $r = $zookeeper->get($path);
    if ($r)
      echo $r;
    else
      echo 'ERR';
    ?>

上の例の出力は以下となります。

    nodevalue

### 参考

- Zookeeper::create() - Create a node synchronously
- Zookeeper::setAcl() - Sets the acl associated with a node synchronously
- Zookeeper::getAcl() - Gets the acl associated with a node synchronously
- ZooKeeper States
- ZookeeperException

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