thinkphp overrides base class methods

ThinkPHP is a popular PHP development framework that provides rich functions and convenient development methods. In the process of using ThinkPHP, sometimes we need to modify the core code of the framework to meet our specific needs. Among them, overriding base class methods is a common modification method.

The base class refers to the basic class in the core code in the framework, which contains many important methods. Overriding a base class method means modifying the behavior of a method to suit our development needs without changing the original function of the base class. This article will introduce how ThinkPHP overrides base class methods.

1. Create an extension class

In ThinkPHP, we can override base class methods by creating an extension class. Extension classes refer to classes that are extended on the basis of the framework. We can create extension class files in the extend directory under the application directory, and the namespace of the class needs to be the same as the framework. For example, if we need to override the method of the controller base class, we can create the following file:

<?php
namespace thinklibrarycontroller;
use thinkController;

class Base extends Controller
{
    //重写方法
    protected function _initialize()
    {
        //新的代码
    }
}

In the extension class, we need to inherit the overridden base class, and then override the method that needs to be modified. That is Can. In the above example, we override the _initialize() method in the controller base class.

2. Rewriting readers and setters

In addition to overriding ordinary methods, sometimes we also need to override the readers and setters in the base class setter. Readers are methods used to access private and protected properties in a class, while setters are methods used to set property values.

To override the reader and setter, we need to define a method with the same name in the extended class and use parent:: to call the method in the base class. For example, we need to override the reader and setter in the Model base class, we can create the following file:

<?php
namespace thinklibrarymodel;
use thinkModel;

class Base extends Model
{
    //重写读取器
    public function __get($name)
    {
        //新的代码
        return parent::__get($name);
    }

    //重写设置器
    public function __set($name, $value)
    {
        //新的代码
        parent::__set($name, $value);
    }
}

In the above example, we override __get() in the Model base class and __set() method.

3. Use overridden methods

After overriding the base class method in the extension class, we need to use the overridden method in actual development. We can specify the use of methods in the extension class by modifying the configuration items in the file in the config directory under the application directory.

For example, after overriding the _initialize() method of the controller base class, we can specify the extension class as the application's default controller base class:

//config.php文件中添加以下代码
'controller' => 'appindexcontrollerAuth',

Need to note What is important is that we need to modify the configuration items in the files in the application directory, not the core code files of the framework. This way when we upgrade the framework, the methods we override will not be overwritten.

Conclusion

Overriding base class methods is a flexible way to modify the original code of the framework. By using extension classes, we can meet our specific needs without changing the original functionality of the framework. When maintaining the code and upgrading the framework, we can also easily export the modified content to ensure the maintainability of the code.

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