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Yaf_Config_Simple::__construct() is a constructor method in the Yaf Framework's Simple Configuration class for PHP. This constructor is used to create an instance of the Yaf_Config_Simple class.

The Yaf_Config_Simple class is a simple implementation of the Yaf_Config_Abstract class, which is used to represent configuration data. It provides a way to store and access configuration data in a hierarchical manner.

To use the Yaf_Config_Simple::__construct() method, you need to pass an optional parameter, which is an array of configuration data. This array should contain key-value pairs representing the configuration options you want to set.

Here is an example of how you can use the Yaf_Config_Simple::__construct() method:

php
$configArray = array(
'database' => array(
'host' => 'localhost',
'username' => 'root',
'password' => 'password',
'database' => 'mydb'
),
'app' => array(
'name' => 'My Application',
'debug' => true
)
);

$config = new Yaf_Config_Simple($configArray);


In this example, the $configArray variable contains the configuration data for the application. The Yaf_Config_Simple::__construct() method is used to create an instance of the Yaf_Config_Simple class and pass the $configArray as the configuration data.

After creating the $config object, you can access the configuration data using dot notation. For example:

php
$databaseHost = $config->database->host;
$appName = $config->app->name;


In this example, we retrieve the value of the 'host' key from the 'database' section of the configuration and store it in the $databaseHost variable. Similarly, we retrieve the value of the 'name' key from the 'app' section of the configuration and store it in the $appName variable.

This is a basic explanation of how to use the Yaf_Config_Simple::__construct() method and work with the Yaf_Config_Simple class in PHP.