How to Load Classes in an MVC Framework Using Pretty URLs?

How to load classes in MVC-like pages based on pretty URLs?

When building a custom MVC website, you often need to deal with dynamic URLs, where the URL path represents an action to be performed within the application. A common challenge is how to map different parts of the URL to controller methods.

Problem

To dynamically expand the categories in the blog controller, you can use the following steps:

1. Use regular expressions Parsing URLs : URLs can be parsed by defining a regular expression pattern and matching it against the incoming URL and extract relevant information such as controllers, methods, and parameters.
2. Auto-loading controller classes: Based on the parsed controller name, you can use the auto-loading function to automatically load the corresponding class file. Autoloading eliminates the manual work of manually including controller files.
3. Call controller method : Once the controller class is loaded, the corresponding controller method can be called using the resolved method name. Methods can handle request parameters and generate responses.
4. Dynamically adding controller methods: Dynamically adding methods to a controller is possible, but generally not recommended. Instead, adopt a strategy in which the logic of a controller method is broken down into smaller, more general functions or modules that can be used in multiple methods.

Answer

One way to implement this functionality is:

// 正则表达式模式匹配 URL 路径
$pattern = '/^(?<controller>\w+)\/(?<method>\w+)\/(?<param>\w+)$/';

// 获取解析结果
$matches = preg_match($pattern, $url, $matches);

// 自动加载控制器类
$class = '\Controller\' . $matches['controller'];
$controller = new $class();

// 调用控制器方法
$controller->{$matches['method']}($matches['param']);

This method allows you to combine any number of categories Dynamically added to the blog controller without modifying the controller itself.

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