Simple implementation of thinkphp ajax technology page without refreshing

With the development of the Internet, page refresh-free technology has become a more efficient way to develop web pages, and AJAX (Asynchronous JavaScript and XML) is one of the implementation methods. This article will introduce how to implement refresh-free AJAX technology in thinkphp.

1. Overview of AJAX technology

AJAX is an asynchronous communication method that uses JavaScript and XML technology. It can interact with the server for data without refreshing the page, improving user interaction. experience. Specifically, AJAX sends a request to the server through the XMLHttpRequest object. After the server returns the data, it dynamically modifies the page content through JavaScript, thereby achieving a page refresh-free effect.

2. The basic structure of thinkphp framework

Under the thinkphp framework, we need to first understand its basic structure. The MVC architecture of thinkphp framework includes three parts: Model, View and Controller. Among them, Model is mainly responsible for processing data logic, View is responsible for displaying pages, and Controller is responsible for processing user requests and calling Model or View for corresponding processing.

3. Steps to implement AJAX refreshless technology

The following will introduce the steps of how to implement AJAX refreshless technology under the thinkphp framework:

Step 1: Create Controller

First you need to create a Controller in the project to handle AJAX requests, and define functions for data processing and page display in the Controller.

Taking "Demo" as the name of the Controller as an example, the code is as follows:

<?php
namespace app\index\controller;

use think\Controller;

class Demo extends Controller
{
    public function doSomething()
    {
        // 数据处理代码
    }

    public function showSomething()
    {
        // 页面展示代码
    }
}

Step 2: Write the AJAX request code

In the page, you need to write the AJAX request code through JavaScript , and sends the request to the Controller's processing function.

The code is as follows:

<script type="text/javascript">
    function ajaxRequest() {
        let xhr = new XMLHttpRequest();
        xhr.onreadystatechange = function () {
            if (xhr.readyState === 4 && xhr.status === 200) {
                document.getElementById("content").innerHTML = xhr.responseText;
            }
        };
        xhr.open("GET", "/index/demo/doSomething", true);
        xhr.send();
    }
</script>

In the above code, an XMLHttpRequest object xhr is first created, and then a callback function is defined when its status changes. When xhr.readyState equals 4 and xhr.status equals 200, it means the AJAX request is successful. At this time, the data returned from the server will dynamically modify the content of the page through JavaScript. The xhr.open() function is used to specify the request method and request address, and the xhr.send() function is used to send the request to the server for processing.

Step 3: Process the request and return data

When the user clicks the button or performs certain operations, the ajaxRequest() function written in the previous article will be triggered, which will call doSomething in the Controller. () function handles the request. The doSomething() function is mainly responsible for processing data logic and returning the processing results to the front-end page.

Code example:

public function doSomething()
{
    $data = array("name" => "Apple", "price" => "5.00");
    return json_encode($data);
}

In the above code, an array $data containing product names and prices is first defined, and then the data is converted into JSON format through the json_encode() function and returned.

Step 4: Display data

In the front-end page, we need to write code to display data. Here we call showSomething() in Controller to implement data display.

Code example:

public function showSomething()
{
    $this->fetch('example');
}

In the above code, the example.html template file saved in the \views directory is loaded through the $this->fetch() function to realize the display of data. .

4. Summary

This article briefly introduces how to implement AJAX refreshless technology under the thinkphp framework. By operating Controller, View and JavaScript, we can easily achieve page interaction effects without refreshing, improving the display efficiency and user interactivity of web pages.

The above is the detailed content of Simple implementation of thinkphp ajax technology page without refreshing. For more information, please follow other related articles on the PHP Chinese website!