使用yii框架的url路径一般形如hostname/?r=xxxx/xxxx/xxxx&sdfs=dsfdsf
我们可以看到有时会使用protected目录下的controller,有时会使用module中controller,具体是如何处理的呢,请看如下的分析:
以下代码摘自yii框架核心代码%Yiiroot%/framework/web/CWebApplication.php
=================================================================================================
//1.runController是执行一个controller的方法,$route是$_GET['r']
public function runController($route)
{
//在这里调用createController先去创建一个controller实例,由此可见createController是选择controller的关键
if(($ca=$this->createController($route))!==null)
{
list($controller,$actionID)=$ca;
$oldController=$this->_controller;
$this->_controller=$controller;
$controller->init();
$controller->run($actionID);
$this->_controller=$oldController;
}
else
throw new CHttpException(404,Yii::t('yii','Unable to resolve the request "{route}".',
array('{route}'=>$route===''?$this->defaultController:$route)));
}
==================================================================================================
//2.接下来我们分析createController,假设我们访问的route是site/contact
public function createController($route,$owner=null)
{
//首次进入这个函数,$owner参数为空
if($owner===null)
$owner=$this;
//如果$route参数中不含/,那么使用默认的controller
if(($route=trim($route,'/'))==='')
$route=$owner->defaultController;
$caseSensitive=$this->getUrlManager()->caseSensitive;
//为了能够完整运行下面的循环,给$route后面加一个/
$route.='/';
//将/的位置保存在$pos中
while(($pos=strpos($route,'/'))!==false)
{
//$id是前半部分,即site
$id=substr($route,0,$pos);
if(!preg_match('/^\w+$/',$id))
return null;
if(!$caseSensitive)
$id=strtolower($id);
//$route变成后半部分,即contact
$route=(string)substr($route,$pos+1);
//controller根目录或子目录前缀
if(!isset($basePath)) // first segment
{
//首次进入,$owner为空,没有这个成员变量
//非首次进入或$owner有值,有可能设置了这个成员变量,参见CWebModule类
if(isset($owner->controllerMap[$id]))
{
return array(
Yii::createComponent($owner->controllerMap[$id],$id,$owner===$this?null:$owner),
$this->parseActionParams($route),
);
}
//如果能通过getModule方法获取到一个独立模块,则再次调用createController,适用于site是module名的情况,参考protected/config/main.php配置文件,例如你的controller在%webroot%/protected/module/site/controller/ContactController.php
if(($module=$owner->getModule($id))!==null)
return $this->createController($route,$module);
//controller的目录:
//对于CWebApplication,对应config['basePath'](参见配置文件)./controller/,例如你的controller在%webroot%/protected/controller/SiteController.php
//对于CModule的子类,对应改子类所在文件夹./contoller/,例如你的controller在%webroot%/protected/module/site/controller/ContactController.php
$basePath=$owner->getControllerPath();
$controllerID='';
}
else
$controllerID.='/';
$className=ucfirst($id).'Controller';
$classFile=$basePath.DIRECTORY_SEPARATOR.$className.'.php';
//如果$classFile存在,根据上面所得到的controller类文件路径,创建类实例
//如果不存在,则是子目录下的controller,继续循环寻找最终的controller,例如你的controller在%webroot%/protected/controller/somedir/SiteController
if(is_file($classFile))
{
if(!class_exists($className,false))
require($classFile);
if(class_exists($className,false) && is_subclass_of($className,'CController'))
{
$id[0]=strtolower($id[0]);
return array(
new $className($controllerID.$id,$owner===$this?null:$owner),
$this->parseActionParams($route),
);
}
return null;
}
$controllerID.=$id;
$basePath.=DIRECTORY_SEPARATOR.$id;
}
}

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PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

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PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.

In PHP, use the clone keyword to create a copy of the object and customize the cloning behavior through the \_\_clone magic method. 1. Use the clone keyword to make a shallow copy, cloning the object's properties but not the object's properties. 2. The \_\_clone method can deeply copy nested objects to avoid shallow copying problems. 3. Pay attention to avoid circular references and performance problems in cloning, and optimize cloning operations to improve efficiency.

PHP is suitable for web development and content management systems, and Python is suitable for data science, machine learning and automation scripts. 1.PHP performs well in building fast and scalable websites and applications and is commonly used in CMS such as WordPress. 2. Python has performed outstandingly in the fields of data science and machine learning, with rich libraries such as NumPy and TensorFlow.


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