使用PHP处理数据库数据如何将数据返回客户端并显示当前状态，php当前状态
使用PHP处理数据库数据如何将数据返回客户端并显示当前状态，php当前状态
php处理大量数据，每处理一个数据返回客户端显示当前状态的方法。
类似于dedecms生成静态页
想法:
1.客户端发送请求
2.服务器端接受请求，开始统计所需处理的数据量
3.将所需处理数据按一定规则排列，发送到服务器处理端
4.服务器处理端处理了第一个数据，将处理结果经过一定处理后发送给客户端
5.客户端接收到结果，自动将处理结果显示并发送到服务器
6.服务器接收到处理结果 将它转发到服务器处理端
7.处理端继续处理结果...
8.循环4-7步骤，直到处理完毕
实验过程：
1.创建数据库和表
create databases handle; create table user( id int unsigned not null auto_increment primary key, name varchar(8), sex tinyint(1) default '1', score int not null, state tinyint(1) );
2.向表中添加数据（不示例）
3.创建index.html客户端，a.php服务端1，b.php服务端2
Index.html:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>客户端</title>
</head>
<body>
<button onclick="send('a.php?state=0')">开始请求</button>
<div style="position: fixed;width: 500px;height: 300px;top: 100px;background: gray">
<span style="color: white;font-size: 20px;"></span>
</div>
<script type="text/javascript" src="./jquery-1.10.2.min.js"></script>
<script type="text/javascript">
//创建一个模态框
function display(value){
$('span').html(value);
}
//ajax
function send(dizhi){
$.ajax({
type: "get",
url: dizhi,
success: function(msg){
var arr=JSON.parse(msg);
console.log(arr);
//alert(arr.value);
var tishi="已经处理 "+arr.now +"个，共"+arr.all+"个";
display(tishi);
if(arr.now!=arr.all){
send("a.php?now="+arr.now+"&all="+arr.all);
}else{
alert("完成!");
}
}
});
}
</script>
</body>
</html> a.php:
<?php
require('./dbconfig.php');
$link=mysql_connect(HOST,USER,PASS) or die('数据库链接失败');
mysql_select_db(DBNAME);
/*
查询数据
$sql="select * from user";
$result=mysql_query($sql);
$row=mysql_fetch_assoc($result);
var_dump($row);
*/
/*
循环插入
for($i=3;$i<=100;$i++){
$sql= "insert into user(name,score,state) values('z".$i."',".$i.",1)";
mysql_query($sql);
}
*/
/*查询需要处理的数据总数*/
//isset($_GET['state'])?$_GET['state']:0;
if(isset($_GET['state'])){
$sql="select count(*) from user";
$result=mysql_query($sql);
$all=mysql_result($result,0);
$now=0;
header("Location: b.php?all={$all}&now=0");
}else{
header("Location: b.php?all={$_GET['all']}&now={$_GET['now']}");
}
/*返回当前处理的数据*/ b.php:
<?php
require('./dbconfig.php');
$link=mysql_connect(HOST,USER,PASS) or die('数据库链接失败');
mysql_select_db(DBNAME);
/*返回当前处理的数据*/
//$id=$_GET['id'];//获取将要处理的id
$now=$_GET['now'];//已经处理的个数
$all=$_GET['all'];//总共要处理的个数
$sql="select score from user limit {$now},1";
$result=mysql_query($sql);
$value=mysql_result($result, 0);
$now++;
$arr=array(
'now'=>$now,
'all'=>$all,
'value'=>$value
);
//print_r($arr);
echo json_encode($arr); dbconfig.php:
<?php
define('HOST','127.0.0.1');
define('USER', 'root');
define('PASS','root');
define('DBNAME','handle'); 以上所述是小编给大家分享的使用PHP处理数据库数据如何将数据返回客户端并显示当前状态，希望对大家有所帮助！
您可能感兴趣的文章:
- MySQL 客户端不输入用户名和密码直接连接数据库的2个方法
- oracle数据库在客户端建立dblink语法
- DB2新手使用的一些小笔记:新建实例、数据库路径不存在、客户端连接 .
- Orcale 数据库客户端PL/SQL 中文乱码的问题解决方法
- python网络编程学习笔记(九)：数据库客户端 DB-API
- PostgreSQL数据库服务端监听设置及客户端连接方法教程
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,
Explain late static binding in PHP (static::).
Apr 03, 2025 am 12:04 AM
Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.
What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases?
Apr 03, 2025 am 12:03 AM
What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
PHP and Python: Comparing Two Popular Programming Languages
Apr 14, 2025 am 12:13 AM
PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.
MySQL: Simple Concepts for Easy Learning
Apr 10, 2025 am 09:29 AM
MySQL is an open source relational database management system. 1) Create database and tables: Use the CREATEDATABASE and CREATETABLE commands. 2) Basic operations: INSERT, UPDATE, DELETE and SELECT. 3) Advanced operations: JOIN, subquery and transaction processing. 4) Debugging skills: Check syntax, data type and permissions. 5) Optimization suggestions: Use indexes, avoid SELECT* and use transactions.
PHP: A Key Language for Web Development
Apr 13, 2025 am 12:08 AM
PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7
Explain the match expression (PHP 8 ) and how it differs from switch.
Apr 06, 2025 am 12:03 AM
In PHP8, match expressions are a new control structure that returns different results based on the value of the expression. 1) It is similar to a switch statement, but returns a value instead of an execution statement block. 2) The match expression is strictly compared (===), which improves security. 3) It avoids possible break omissions in switch statements and enhances the simplicity and readability of the code.
What is Cross-Site Request Forgery (CSRF) and how do you implement CSRF protection in PHP?
Apr 07, 2025 am 12:02 AM
In PHP, you can effectively prevent CSRF attacks by using unpredictable tokens. Specific methods include: 1. Generate and embed CSRF tokens in the form; 2. Verify the validity of the token when processing the request.
