How Ajax+php performs data interaction and partial page refresh-JS Tutorial-php.cn

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How Ajax+php performs data interaction and partial page refresh

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Mar 31, 2018 am 11:49 AM

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This time I will show you how Ajax+php performs data interaction and partial page refresh. What are the precautions for Ajax+php to perform data interaction and partial page refresh? The following is a practical case. Get up and take a look.

What is Ajax?

The domestic translation is often "Ajax" and the homonym of Ajax football team. AJAX is a technology used to create fast dynamic web pages. It is not a new language, but is a new way of using existing standards. AJAX allows web pages to be updated asynchronously by exchanging small amounts of data with the server in the background, so that parts of the web page can be updated without reloading the entire web page.

XMLHttpRequest is the basis of AJAX and is used to exchange data with the server. All modern browsers support the XMLHttpRequest object (IE5 and IE6 use ActiveX

Object)

The following article mainly introduces the use of ajax to interact with php data and partially refresh the page. Content, not much to say below, let’s take a look at the detailed introduction:

1. Introduction to syntax

1.1 Basic ajax syntax

$.ajax({
 type: "post",        //数据提交方式（post/get）
 url: "http://xxx/test/demo.php",   //提交到的url
 data: {username:username,password:password},//提交的数据
 dataType: "json",       //返回的数据类型格式
 success: function(msg){
  ...//返回成功的回调函数
 },
 error:function(msg){
  ...//返回失败的回调函数
 }
});

1.2 php side receiving method

<!--?php
 $username=$_POST[&#39;username&#39;]; //接收以post方式提交来的username数据
 $password=$_POST[&#39;password&#39;];
?>

2. Detailed example

2.1 html Terminal code demo.html

<!doctype html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>ajaxTest</title>
</head>
<body>
 <input type="text" id="username">
 <input type="text" id="password">
 <button id="sub">查询</button>
 <span id="text"></span><!-- 用以显示返回来的数据，只刷新这部分地方 -->

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