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Implement Weibo wall and real-time updates using PHP and XML

WBOYOriginal: 2023-08-09 08:07:491315browse

Use PHP and XML to implement Weibo wall and real-time updates

With the popularity of social media, Weibo has become an important platform for people to share their daily life and communicate. Adding a Weibo wall to a web page allows users to view Weibo messages in real time and update them in real time. This article will introduce how to use PHP and XML to implement a simple Weibo wall and automatically update when new Weibo is published.

First, we need to create an HTML page to display the Weibo wall and receive Weibo messages entered by users. Suppose we already have a file called index.html, here is its basic structure:

<!DOCTYPE html>
<html>
<head>
<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
<script src="script.js"></script>
</head>
<body>
<h2>微博墙</h2>
<div id="weiboWall"></div>
<form id="weiboForm">
  <input type="text" id="message" placeholder="输入你的消息">
  <input type="submit" value="发布">
</form>
</body>
</html>

In the HTML file, we have introduced the jQuery library and a JavaScript file called "script.js". Next, we will write the code to interact with the backend in the script.js file.

$(document).ready(function() {
  // 当页面加载完毕后，执行以下操作
  loadData();   // 加载已有的微博消息
  setInterval(loadData, 5000);   // 每隔5秒自动更新微博消息

  $("#weiboForm").submit(function(event) {
    event.preventDefault();   // 阻止表单的默认提交动作

    // 获取用户输入的消息
    var message = $("#message").val();

    // 发送消息到后端
    $.post("post.php", {message: message}, function(response) {
      // 发布成功后刷新微博墙
      loadData();
      $("#message").val("");   // 清空输入框
    });
  });

  function loadData() {
    $.get("get.php", function(response) {
      // 清空微博墙
      $("#weiboWall").empty();
      // 将返回的XML数据解析为JavaScript对象
      var xml = $.parseXML(response);
      // 遍历解析后的数据，并将消息显示在微博墙上
      $(xml).find("message").each(function() {
        var message = $(this).find("content").text();
        var time = $(this).find("time").text();
        $("#weiboWall").append("<p>" + message + " - " + time + "</p>");
      });
    });
  }
});

In the script.js file, we first use jQuery's $(document).ready() method to ensure that the web page is loaded before performing the next operation. We load existing Weibo messages through the loadData() function, and use the setInterval() function to automatically update Weibo messages every 5 seconds.

When the user enters a message in the form and clicks the "Publish" button, submitting the form will trigger the $("#weiboForm").submit() function. This function prevents the form's default submit action and uses the $.post() method to send a message to the backend's post.php file. In the post.php file, we save the received message into an XML file.

The loadData() function is used to load Weibo messages and display them on the Weibo wall. We use the $.get() method to obtain the XML data of the saved Weibo message from the get.php file on the backend. Then, we use the $.parseXML() method to parse the returned XML data into a JavaScript object, and use the $(xml).find() and $(this).find() methods to obtain and display the content of each Weibo message and time.

Finally, we need to create two PHP files to handle the requests sent by the front end and provide corresponding responses.

In the post.php file, we use the SimpleXML library to save the Weibo messages sent by the user into an XML file:

<?php
if(isset($_POST['message'])){
  $message = $_POST['message'];
  $time = date("Y-m-d H:i:s");

  $xml = new SimpleXMLElement('<messages></messages>');
  $messageElement = $xml->addChild('message');
  $messageElement->addChild('content', $message);
  $messageElement->addChild('time', $time);
  $xml->asXML('messages.xml');
}
?>

In the get.php file, we read the XML file Content and return it to the front end:

<?php
if(file_exists('messages.xml')){
  $xml = simplexml_load_file('messages.xml');
  header('Content-Type: text/xml');
  echo $xml->asXML();
}
?>

At this point, we have completed the work of implementing Weibo wall and real-time updates using PHP and XML. By adding a Weibo wall and a form to receive user input in an HTML file, and using PHP to handle the back-end logic and save Weibo messages through an XML file, we can implement a simple Weibo wall and display it in real time when a new Weibo is published renew. Of course, this is just a basic version and you can expand and optimize it according to your needs.

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