没有构造函数的配置 Yii::WebApplication

Question

在 Yii 1.1 的 bootstrap 中（app/index.php，第 13 行），我们使用 Yii::createWebApplication($config)->run(); 命令启动应用程序，createWebApplication 方法是(framework/YiiBase.php, 第 96 行)

public static function createWebApplication($config=null)
{
    return self::createApplication('CWebApplication',$config);
}

这样 createWebApplication 方法是（framework/YiiBase，第 123 行）

public static function createApplication($class,$config=null)
{
    return new $class($config);
}

所以 createApplication('CWebApplication',$config) 解释成 new CWebApplication($config); 这样的东西，嗯？但是在 CWebApplication class 上，我们没有任何构造函数！（framework/yiilite.php，第 1622 行）。

现在的问题是： WebApplication 如何获取 $config 变量的配置并适应它？

Answer 1

下面的函数将returnreturn new CWebApplication($config);

public static function createApplication($class,$config=null)
{
    return new $class($config);

}

如果你检查 CWebApplication class 扩展 CApplication， CWebApplication.php

 class CWebApplication extends CApplication
    {
...

在 CApplication 中你会发现初始化的构造方法，framework/base/CApplication.php

abstract class CApplication extends CModule
{

 ....
  public function __construct($config=null)
    {
        Yii::setApplication($this);

        // set basePath at early as possible to avoid trouble
        if(is_string($config))
            $config=require($config);
        if(isset($config['basePath']))
        {
            $this->setBasePath($config['basePath']);
            unset($config['basePath']);
        }
        else
            $this->setBasePath('protected');
        Yii::setPathOfAlias('application',$this->getBasePath());
        Yii::setPathOfAlias('webroot',dirname($_SERVER['SCRIPT_FILENAME']));
        if(isset($config['extensionPath']))
        {
            $this->setExtensionPath($config['extensionPath']);
            unset($config['extensionPath']);
        }
        else
            Yii::setPathOfAlias('ext',$this->getBasePath().DIRECTORY_SEPARATOR.'extensions');
        if(isset($config['aliases']))
        {
            $this->setAliases($config['aliases']);
            unset($config['aliases']);
        }

        $this->preinit();

        $this->initSystemHandlers();
        $this->registerCoreComponents();

        $this->configure($config);
        $this->attachBehaviors($this->behaviors);
        $this->preloadComponents();

        $this->init();
    }


abstract class CApplication
{
    protected $config=array();

    public function __construct($config=null) {

        echo "CApplication::construct() called";

        // DO anyting with config arrray which is from /protected/config/main.php
         //$this->config = $config;

    }

}

CWebApplication继承了CApplication所以也继承了Constructor方法。要了解这个想法，您可以查看我下面的示例。

Edit

    abstract class CApplication
{
    protected $config=array();

    public function __construct($config=null) {

        echo "CApplication::construct() called";

        // DO anyting with config arrray which is from /protected/config/main.php
         //$this->config = $config;

    }

}

class CWebApplication extends CApplication
{

    public function test(){

        echo "<pre>";
        print_r($this->config);
        echo "</pre>";
    }

}

$config =  array(
    "name"          =>"My Web Application",
    "components"    => array(

        "db"        => "connectionstring:..",
        "urlManage"=> array(),
    )

);

$obj =  new CWebApplication($config);

没有构造函数的配置 Yii::WebApplication

Config Yii::WebApplication without Constructor

php

oop

yii