读取配置

Phalcon\Config is a component used to convert configuration files of various formats (using adapters) into PHP objects for use in an application.

值可以从 Phalcon\Config 获得，详情如下：

<?php

use Phalcon\Config;

$config = new Config(
    [
        'test' => [
            'parent' => [
                'property'  => 1,
                'property2' => 'yeah',
            ],
        ],  
    ]
);

echo $config->get('test')->get('parent')->get('property');  // displays 1
echo $config->test->parent->property;                       // displays 1
echo $config->path('test.parent.property');                 // displays 1

工厂

使用 adapter 选项加载配置适配器类，如果没有扩展提供，它将被添加到 文件的路径

<?php

use Phalcon\Config\Factory;

$options = [
    'filePath' => 'path/config',
    'adapter'  => 'php',
 ];

 $config = Factory::load($options);

Native Arrays

The first example shows how to convert native arrays into Phalcon\Config objects. 此选项提供了最佳性能，因为在此请求时没有读取文件。

<?php

use Phalcon\Config;

$settings = [
    'database' => [
        'adapter'  => 'Mysql',
        'host'     => 'localhost',
        'username' => 'scott',
        'password' => 'cheetah',
        'dbname'   => 'test_db'
    ],
     'app' => [
        'controllersDir' => '../app/controllers/',
        'modelsDir'      => '../app/models/',
        'viewsDir'       => '../app/views/'
    ],
    'mysetting' => 'the-value'
];

$config = new Config($settings);

echo $config->app->controllersDir, "\n";
echo $config->database->username, "\n";
echo $config->mysetting, "\n";

如果你想要更好地组织你的项目你可以在另一个文件中保存该数组，然后读取它。

<?php

use Phalcon\Config;

require 'config/config.php';

$config = new Config($settings);

文件适配器

可用的适配器是：

类	描述
Phalcon\Config\Adapter\Ini	使用 INI 文件来存储设置。在内部，适配器使用PHP函数`parse_ini_file`。
Phalcon\Config\Adapter\Json	使用 JSON 文件来存储设置。
Phalcon\Config\Adapter\Php	使用PHP多维数组存储设置。这个适配器提供了最好的性能。
Phalcon\Config\Adapter\Yaml	使用 YAML 文件来存储设置。

读取 INI 文件

Ini 文件是常见的方式来存储设置。 Phalcon\Config uses the optimized PHP function parse_ini_file to read these files. Files sections are parsed into sub-settings for easy access.

[database]
adapter  = Mysql
host     = localhost
username = scott
password = cheetah
dbname   = test_db

[phalcon]
controllersDir = '../app/controllers/'
modelsDir      = '../app/models/'
viewsDir       = '../app/views/'

[models]
metadata.adapter  = 'Memory'

您可以读取文件，如下所示：

<?php

use Phalcon\Config\Adapter\Ini as ConfigIni;

$config = new ConfigIni('path/config.ini');

echo $config->phalcon->controllersDir, "\n";
echo $config->database->username, "\n";
echo $config->models->metadata->adapter, "\n";

合并配置

Phalcon\Config can recursively merge the properties of one configuration object into another. New properties are added and existing properties are updated.

<?php

use Phalcon\Config;

$config = new Config(
    [
        'database' => [
            'host'   => 'localhost',
            'dbname' => 'test_db',
        ],
        'debug' => 1,
    ]
);

$config2 = new Config(
    [
        'database' => [
            'dbname'   => 'production_db',
            'username' => 'scott',
            'password' => 'secret',
        ],
        'logging' => 1,
    ]
);

$config->merge($config2);

print_r($config);

上面的代码产生以下内容：

Phalcon\Config Object
(
    [database] => Phalcon\Config Object
        (
            [host] => localhost
            [dbname]   => production_db
            [username] => scott
            [password] => secret
        )
    [debug] => 1
    [logging] => 1
)

有更多的适配器可供此 Phalcon incubaror 中的组件

嵌套的配置

您可以使用Phalcon\Config::path方法轻松访问嵌套的配置值。这种方法允许获取值，而不考虑路径的某些部分不存在。让我们看看一个例子：

<?php

use Phalcon\Config;

$config = new Config(
   [
        'phalcon' => [
            'baseuri' => '/phalcon/'
        ],
        'models' => [
            'metadata' => 'memory'
        ],
        'database' => [
            'adapter'  => 'mysql',
            'host'     => 'localhost',
            'username' => 'user',
            'password' => 'passwd',
            'name'     => 'demo'
        ],
        'test' => [
            'parent' => [
                'property' => 1,
                'property2' => 'yeah'
            ],
        ],
   ]
);

// Using dot as delimiter
$config->path('test.parent.property2');    // yeah
$config->path('database.host', null, '.'); // localhost

$config->path('test.parent'); // Phalcon\Config

// Using slash as delimiter. 也可以指定默认值
// 如果配置选项不存在, 将返回。
$config->path('test/parent/property3', 'no', '/'); // no

Config::setPathDelimiter('/');
$config->path('test/parent/property2'); // yeah

下面的示例展示了如何创建usefull facade来访问嵌套的配置值:

<?php

use Phalcon\Di;
use Phalcon\Config;

/**
 * @return mixed|Config
 */
function config() {
    $args = func_get_args();
    $config = Di::getDefault()->getShared(__FUNCTION__);

    if (empty($args)) {
       return $config;
    }

    return call_user_func_array([$config, 'path'], $args);
}

Injecting Configuration Dependency

You can inject your configuration to the controller allowing us to use Phalcon\Config inside Phalcon\Mvc\Controller. 要做到这一点，您必须将其作为服务添加到依赖注入器容器中。在引导文件中添加以下代码:

<?php

use Phalcon\Di\FactoryDefault;
use Phalcon\Config;

// Create a DI
$di = new FactoryDefault();

$di->set(
    'config',
    function () {
        $configData = require 'config/config.php';

        return new Config($configData);
    }
);

现在在您的控制器可以访问您的配置通过使用依赖注入功能使用名称 config 像下面的代码：

<?php

use Phalcon\Mvc\Controller;

class MyController extends Controller
{
    private function getDatabaseName()
    {
        return $this->config->database->dbname;
    }
}

General

Release Notes

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