search
HomeBackend DevelopmentPHP TutorialA brief discussion on PHP+MYSQL authentication method_PHP tutorial

近日在为学校制做校友录时,需要身份验证,在对比之后决定采用PHP+MYSQL进行身份验证。
  
  之前也曾考虑过用cookies或session。但是用cookies,在用户离线再上线后,只要cookies不过
期,不用登录仍然可以保持在线,这对于网吧来说是个隐患。而且用户可以关闭cookies,这样身份验

证就不成功。也考虑过用session,session在浏览过程中不断的将访问信息加入到session中,如果用户

在网站内时间很长,浏览的页面很多,就用导致session越来越大,浏览速度降低,最后只有重新登录,

虽然这种情况不多见,但不是我们所希望的。

  
  我在做这个身份验证时的想法是,在身份验证的同时,记录浏览信息。

  用户ID在每个页面间传递,ID值是用MD5()函数加密得到的。验证函数是validate_id(),返回值为

(0,1),成功为“1”。

  思路:

    判断被传入的ID值是否为匿名登录ID(a684dd572b1887661782981659331eed),32位,如果是返回0,并且

  将浏览信息加入数据库。如果否,则查询数据库,看数据库中的用户ID,用户IP与传入的ID,IP值是否相等

  并且最近浏览时间距当前时间不到20分钟的记录。
    
    判断得到的记录数,如果为0,则认为离线,并用匿名ID登录浏览信息,返回0。记录不为0时,将

  用户ID,用户IP值,加入数据库,返回1。


创建数据库:
  
  create table logging{

id int unsigned not null primary key auto_increment,

user_id char(32) not null,//用户ID

logging_ip varchar(20) not null,//记录用户IP地址

page_name varchar(30) not null,//浏览网页名

view_time timestamp not null,

student_id varchar(20)

);


创建函数:


/*-----begin function validate-id()---------------
验证用户是否登录

------------------------------------------------*/
function validate_id($link,$id,$ip,$page_name,$student_id=""){
if($id==a684dd572b1887661782981659331eed or $id=){
$query=insert into logging(user_id,logging_ip,page_name,student_id) values ("a684dd572b1887661782981659331eed",".$ip.",".$page_name.","anonym");;
$result=mysql_db_query("web",$query,$link);
return (0);
}
else {
$year=strftime("%Y");
$month=strftime("%m");
$day=strftime("%d");
$hour=strftime("%H");
$min=strftime("%M");
$sec=strftime("%S");
echo $time_string=$year.$month.$day.$hour.$min.$sec;
// echo ("
");
// echo "$year-$month-$day $hour-$min-$sec
";
file://---------begin ifs---------------------------
if(($min-=20)$min+=60;
if(($hour-=1)==-1){
$hour+=24;
if(($day-=1)==0){
switch ($month) {
case 12 :$days=30;break;
case 1 :$days=31;break;
case 2 :if(($year/4==0)and($year/100!=0)or($year/400==0)){
$days=29;}
else {$days=28;}
break;
case 3 :$days=31;break;
case 4 :$days=30;break;
case 5 :$days=31;break;
case 6 :$days=30;break;
case 7 :$days=31;break;
case 8 :$days=31;break;
case 9 :$days=30;break;
case 10 :$days=31;break;
case 11 :$days=30;break;
}
$day+=$days;
if(($month-=1)==0){
$month+=12;
$year-=1;
}
}
}
}
file://----------------------------------end ifs
setType($month,"integer");
if($monthsetType($month,"string");
$month=0.$month;}
setType($day,"integer");
if($daysetType($day,"string");
$day=0.$day;}
setType($hour,"integer");
if($hoursetType($min,"string");
$hour=0.$hour;}
setType($min,"integer");
if($minsetType($min,"string");
$min=0.$min;}

echo
.$time_string=$year.$month.$day.$hour.$min.$sec;
// echo "
$year-$month-$day $hour-$min-$sec
";
// echo ("
");
$query="select id from logging where user_id=$id and logging_ip=$ip and view_time>$time_string;";
$result=mysql_db_query("web",$query,$link);
$count=mysql_num_rows($result);
if($count==0){
// echo $query="insert into logging(user_id,logging_ip,page_name) values (a684dd572b1887661782981659331eed,$ip,$page_name);";
$result=mysql_db_query("web",$query,$link);
return (0);
}
else{
$query="insert into logging(user_id,logging_ip,page_name) values($id,$ip,$page_name)";
$result=mysql_db_query("web",$query,$link);
return (1);

}
}//end if
}
file://----------------------- -----end function validate-id---------
This verification method is very simple and does not take into account the user logging in again after logging in. You can add it yourself.

If you use cookies, you may use setcookies() to create a user ID, and then read it from the environment variable $HTTP_COOKIE or $HTTP_COOKIE_VARS

Take. It's all the same, but the user should be guaranteed to have no cookies.

www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/532681.htmlTechArticleRecently, when making an alumni directory for the school, identity verification was required. After comparison, I decided to use PHP+MYSQL for identity verification. verify. I have considered using cookies or sessions before. But using cookies, in...
Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
The Continued Use of PHP: Reasons for Its EnduranceThe Continued Use of PHP: Reasons for Its EnduranceApr 19, 2025 am 12:23 AM

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python: Exploring Their Similarities and DifferencesPHP and Python: Exploring Their Similarities and DifferencesApr 19, 2025 am 12:21 AM

PHP and Python are both high-level programming languages ​​that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP and Python: Different Paradigms ExplainedPHP and Python: Different Paradigms ExplainedApr 18, 2025 am 12:26 AM

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP and Python: A Deep Dive into Their HistoryPHP and Python: A Deep Dive into Their HistoryApr 18, 2025 am 12:25 AM

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

Choosing Between PHP and Python: A GuideChoosing Between PHP and Python: A GuideApr 18, 2025 am 12:24 AM

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP and Frameworks: Modernizing the LanguagePHP and Frameworks: Modernizing the LanguageApr 18, 2025 am 12:14 AM

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHP's Impact: Web Development and BeyondPHP's Impact: Web Development and BeyondApr 18, 2025 am 12:10 AM

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

How does PHP type hinting work, including scalar types, return types, union types, and nullable types?How does PHP type hinting work, including scalar types, return types, union types, and nullable types?Apr 17, 2025 am 12:25 AM

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values ​​and handle functions that may return null values.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software