How to pass id in thinkphp5

ThinkPHP 5 is a popular PHP framework that provides flexible programming and excellent performance. When developing projects using this framework, you often need to obtain and pass ID parameters. This article will introduce how to pass ID in ThinkPHP 5.

In ThinkPHP 5, there are many ways to obtain ID. Normally, we can use placeholders in routing configuration files to get the ID. For example, define a route as follows:

Route::get('user/:id','user/read');

In the above route, :id is a placeholder, indicating to obtain the parameter named id. At this time, we can use the request() function in the read method of the user module to obtain the ID parameter. The code is as follows:

public function read($id)
{
    echo 'User ID: '.$id;
}

above In the code, the $id parameter is the ID value passed through the placeholder :id. We can operate or output the value in the read method.

In addition to using placeholders to obtain the ID value in routing, you can also obtain the ID value in the controller through the parameters of the request() function. For example, assume that there is an InformationController controller under the User module, and there is an edit method:

public function edit(Request $request)
{
    $id = $request->param('id');
    echo 'Information ID: '.$id;
}

In the above code, we use The $request parameter is used to obtain the information of the current request, and the parameter value named id is obtained through the param() method. The parameters passed at this time need to be passed in the query string form of the URL, for example:

http://example.com/index.php/user/information/edit?id=1

In the above URL, the value of the id parameter is 1, that is The ID value passed to the edit method.

In addition to using placeholders and query strings in routes to pass ID values, you can also use more advanced methods to obtain ID values ​​in code. For example, we can get the ID value using the default value in the route, as follows:

Route::get('user/[:id]','user/read', ['id' => '\d+']);

In the above code, use brackets to change :id to [:id], and the default value of the ID is specified as a number by ['id' => '\d ']. At this point, if no ID value is specified in the URL, the default value is used. For example:

http://example.com/index.php/user/read

In the above URL, the ID value is not passed, but since the default value is used, the value of the $id variable will be 0. We can also use the default value method to obtain the ID value in the controller or model.

In summary, there are many ways to obtain and pass ID values ​​in ThinkPHP 5. We can choose different ways to obtain and pass the ID value as needed, and process and use it in the code. In actual development, different methods need to be selected according to specific situations to achieve more flexible programming and applications.

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