3.2. Zend_Config_Array
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## 3.2. Zend_Config_Array

### 3.2.1. Introduction

`Zend_Config_Array` enables developers to have configuration data stored in multidimensional associative PHP arrays and accessed as object properties through `Zend_Config`.

例 3.2. Configuration Data Stored in PHP Arrays

This example illustrates a basic use of `Zend_Config_Array` for loading configuration data from PHP arrays. First, we need to create PHP arrays having the configuration data:

    <?php
    // Production site configuration data
    $config['production'] = array(
        'webhost' => 'www.example.com',
        'database' => array(
            'type'     => 'pdo_mysql',
            'host'     => 'db.example.com',
            'username' => 'dbuser',
            'password' => 'secret',
            'name'     => 'dbname'
        )
    );

    // Staging site configuration data inherits from production and
    // overrides values as necessary
    $config['staging'] = $config['production'];
    $config['staging']['webhost'] = 'dev.example.com';
    $config['staging']['database']['host'] = 'dev.example.com';
    $config['staging']['database']['username'] = 'devuser';
    $config['staging']['database']['password'] = 'devsecret';
    ?>

| 注意
The configuration data array must be named `$config` in the loaded PHP script.

Inheritance is supported in the example above with an assignment of `production` section values to the `staging` section. Now it is a simple matter to load the configuration data with `Zend_Config_Array`:

    <?php
    require_once 'Zend/Config.php';
    require_once 'Zend/Config/Array.php';

    $config = new Zend_Config(Zend_Config_Array::load('/path/to/config.php', 'staging'));

    echo $config->database->host; // prints "dev.example.com"
    ?>

It is noteworthy that because the configuration data are directly added to PHP arrays, each configuration data value has the same data type as given in the PHP script containing the `$config` array.

    <?php
    $config['staging']['debug']   = 'false'; // value has string type
    $config['staging']['console'] = false; // value of boolean type
    $config['staging']['timeout'] = 30; // value of integer type
    ?>

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第 3 章 Zend_Config | 起始页 | 3.3. Zend_Config_Ini