AJAX registration page asynchronous request method implementation

This time I bring you AJAXRegistration pageAsynchronous request method implementation, AJAX registration page asynchronousRequest methodimplementationWhat are the precautionsWhat are the following? This is a practical case, let’s take a look at it.

Introduction to AJAX

(1)AJAX = Asynchronous JavaScript and XML.

(2)AJAX is a technology used to create fast dynamic web pages.

(3) By exchanging a small amount of data with the server in the background, AJAX can enable asynchronous updates of web pages. This means that parts of a web page can be updated without reloading the entire page.

(4) If traditional web pages (not using AJAX) need to update content, the entire web page must be reloaded.

Simple layout

JS determines first, and makes the judgment that the front end can do to reduce server interaction

$('button').on('click',function(){;
      var booluser = $('#data input')[0].value.length >= 8;
      var   boolpwd = $('#data input')[1].value.length >= 6 ;
      var boolpwd1 = $('#data input')[1].value == $('#data input')[2].value ;
      var retel =/^(13[0-9]|14[5|7]|15[0|1|2|3|5|6|7|8|9]|18[0|1|2|3|5|6|7|8|9])\d{8}$/g; 
      var booltel = retel.test($('#data input')[3].value);
      var reemail = /^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/g ;
      var boolemail = reemail.test($('#data input')[4].value);
      //这里应该嵌套使if的,但是不是实际开发,这么写便于代码观看
      if(!booluser){
        console.log('user:不能少于8位');
      }
      if(!boolpwd){
        console.log('pwd:不能少于6位');
      }
      if(!boolpwd1){
        console.log('pwd1:两次输入密码不一致');
      }
      if(!booltel){
        console.log('tel:请输入正确的电话号');
      }
      if(!boolemail){
        console.log('email:请输入正确的邮箱格式');
      }

Use ajax to make asynchronous requests

if(booluser && boolpwd && boolpwd1 && booltel && boolemail){        
        $.ajax({
          type:"get",
         
          url:"reg.php",
          async:true,
          data:{
            user:$('#data input')[0].value,
            pwd:$('#data input')[1].value,
            tel:$('#data input')[3].value,
            email:$('#data input')[4].value
          },
          success : function(data){
            console.log(data);
          }
        });
      }
      })

Receive the data from the network request in php, check the database to make judgments, and feed the results back to the previous section

<?php var_dump($_GET);
$user = $_GET[&#39;user&#39;];
$pwd = $_GET[&#39;pwd&#39;];
$tel = $_GET[&#39;tel&#39;];
$email = $_GET[&#39;email&#39;];
$msg = &#39;&#39;;
header(&#39;Content-type:text/html;charset=utf8&#39;);
  $adders = "mysql:host=localhost;dbname=Users;";
  $db = new PDO($adders,"root");
  $db->exec('set names utf8');
  //链接数据库,创建表
  $result = $db->exec('create table if not exists ajaxreg(user varchar(100) 
     primary key,pwd varchar(100),tel varchar(30),email varchar(30)) 
     default charset=utf8');
  $resulttel = $db->query("select tel from ajaxreg ");
  $resulttel->setFetchMode(PDO::FETCH_ASSOC);
  $arr = $resulttel->fetchAll();
 
  foreach($arr as $ar){
    if( $ar['tel'] == $tel){
      $msg = "您输入的手机号已经存在";
     echo $msg;
    //如果手机号已存在,终止整个程序
    die();
    }
  }
     //如果手机号不存在执行下面代码
     $result = $db->exec("insert into ajaxreg values(
     '$user','$pwd','$tel','$email')");
     if($result){
      $msg = "注册成功";
     }else{
     $msg = "用户名已存在";
     }
  echo $msg;
 $db->close();
?>

Such a A simple registration interface is implemented using AJAX

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the PHP Chinese website!

Recommended reading:

Ajax implements the complete process of registering user names

How to implement the Ajax cycle

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