Let's talk about the POST parameter passing method and implementation method based on ThinkPHP

ThinkPHP is a Web application development framework based on the MVC (Model-View-Controller) design pattern, which is widely used in the field of PHP development. Its unique routing mechanism and flexible template engine allow developers to easily build highly maintainable and scalable web applications.

During the development process, the interaction between the front-end and the back-end is inevitable. In some business scenarios, it is necessary to jump to the page and carry some parameter information so that the backend can perform corresponding processing. ThinkPHP provides a very convenient way to support passing POST parameters while jumping.

This article will introduce the POST parameter transfer method and implementation method based on ThinkPHP.

1. Request method

When passing parameters, you need to determine the delivery method. There are usually two methods, GET and POST. The Get method is to splice the parameters directly behind the URL, which has higher visibility; the POST method is to place the parameters in the entity part of the HTTP request, usually submitted using a form or AJAX.

In ThinkPHP, GET parameter passing is very simple. You only need to splice the parameters after the URL:

// 默认路由传参
http://yourdomain.com/index.php/Index/index/id/1.html

// 自定义路由传参
http://yourdomain.com/index.php/Test/foo/name/MuFan.html

The POST method needs to be combined with form submission or AJAX asynchronous request to pass parameters.

2. Implementation method

When using the POST method to pass parameters, you need to pass the parameters to the controller when jumping. The following is an example:

Suppose there is a form page that needs to submit the form data to the controller for processing.

The form code is as follows:

<form method="POST" action="{:U(&#39;Index/save&#39;)}">
    姓名：<input type="text" name="username">
    年龄：<input type="text" name="age">
    <button type="submit">提交</button>
</form>

When submitting the form, you need to specify the request method as POST, and set the submission address to the processing method in the controller. In the controller, the data submitted by the form can be obtained by using the $_POST global variable.

class IndexController extends Controller{
    // 处理表单提交
    public function save(){
        // 获取POST参数
        $name = $_POST['username'];
        $age = $_POST['age'];

        // 进行相应处理
        // ....

        // 返回跳转
        $this->redirect('Index/index', array('status' => 1));
    }
}

In the controller, the $this->redirect() method is used to implement the jump. This method can accept two parameters: the first parameter is the jump address, and the second parameter is the parameter to be carried, which will be passed in POST mode.

In this example, a parameter named status is used, which will be passed to the index method in the Index controller in POST mode.

In addition, in the URL generation function, you need to add the true parameter to identify the address as POST mode:

// 自定义路由传参
$this->redirect('Test/foo', array('name' => 'MuFan'), true, 302);

Use the above method to achieve POST mode Parameter passing and jumping.

Summary

This article introduces the POST parameter transfer method and implementation method based on the ThinkPHP framework. When using the POST method to pass parameters to the controller, you need to pay attention to the setting of the request method, and you need to use the $this->redirect() method to carry the parameters and set them to the POST method when jumping. The same approach also works for passing POST parameters using AJAX asynchronous requests.

With this method, we can flexibly handle parameter passing issues in forms and other request methods, making our web application development more convenient and faster.

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