How to make modifications in ThinkPHP 5.0

ThinkPHP 5.0 is a lightweight MVC framework based on PHP. Its ease of use, flexibility, and high efficiency make it the first choice for developers. However, as the project develops further, we may need to modify the framework to suit our business needs. This article will introduce how to make modifications in ThinkPHP 5.0.

1. Understand the code structure

Before making modifications, we need to understand the code structure of the framework. The main code structure is:

• application: application directory, all application code is placed in this directory.
• thinkphp: ThinkPHP framework core code directory.
• public: Public root directory, usually where index.php and static resource files are placed.
• vendor: Composer dependent library directory.

2. Modify the core class library

1. Modify the routing class
   The routing class in ThinkPHP 5.0 is located in thinkphp/library/think/Route.php.

Sometimes, we need to do some special processing according to the user's request URL, such as adding some parameters, changing the return value type, etc. At this time we need to modify the routing class. First, you need to create a route.php file in the application directory, and then override the methods of the Route class. For example, if we want to add a data parameter to the return value based on the user request URL, we can change return $result; in the Route class to return ['data' => $result];. At the same time, introduce the original routing file in route.php and modify the Route class.

2. Modify the controller class
   The default controller class in ThinkPHP 5.0 is located in thinkphp/library/think/Controller.php.

Sometimes, our customized controller requires some global parameters or methods, such as permission verification, global variables, etc. At this point, we can define a $options attribute in the controller class to store these parameters or methods. Next, override the __construct method of the controller class in the custom controller and inherit the $options attribute. For example, if we want to inject a $user variable into all controllers, we can add the following code to the controller class:

public $options;

public function __construct()
{
    $this->options = ['user' => 'test'];
    parent::__construct();
}

Then use $this->options[ in the corresponding controller 'user'] to get the injected $user variable.

3. Modify the model class
   The default model class in ThinkPHP 5.0 is located in thinkphp/library/think/Model.php.

Sometimes, we need to change the default methods of the model class to suit our business needs. For example, if we want all query operations to include soft delete fields, we can define an initialization method in the model class and then override it when calling the default query method. For example:

class MyModel extends Model
{
    protected function initialize()
    {
        parent::initialize();
        $this->where(['is_deleted' => 0])->scope('soft_delete', function($query){ 
            $query->where(['is_deleted' => 0]);
        });
    }

    public function find($dataOrWhere = null)
    {
        return $this->softDelete()->where($dataOrWhere)->find();
    }

    public function select($dataOrWhere = null)
    {
        return $this->softDelete()->where($dataOrWhere)->select();
    }
}

In this way, we implement soft delete filtering by adding soft_delete to the query conditions.

3. Modify the configuration file

The configuration file of ThinkPHP 5.0 is located in application/config.php.

We can modify the default configuration of the framework, such as routing and database, in this configuration file. For example, if we want to change the default parameters of ThinkPHP 5.0 routing, we can modify the default parameters in the configuration file to:

'route' => [
    'default_route_pattern' => '[\w\-\_]+',
    // 默认的路由参数分隔符
    'default_route_depr'    => '/',
    // 是否开启路由延迟解析
    'url_route_lazy'        => true,
    // 是否强制使用路由
    'url_route_must'        => true,
    // 是否启用路由缓存
    'route_check_cache'     => true,
],

Similarly, we can also add customized configuration items in the configuration file to adapt Different business needs. For example, if we need to define a constant throughout the application, we can define the constant in the config.php file.

define('APP_VERSION', '1.0.0');
return [
    'test' => 'hello world',
    'constant' => APP_VERSION,
    // 其他配置项
];

Then the defined constant value can be obtained in the application through Config::get('constant').

Summary

When modifying the ThinkPHP 5.0 framework, you need to have a certain understanding of the code structure, and you need to pay attention to compatibility and scalability when making modifications. If compatibility issues arise accidentally, they can be solved through configuration files. If scalability issues arise, they can be resolved by rewriting the framework's core class libraries.

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