关于fsockopen函数连接43端口的问题
我现在搞一个域名whois信息查询的程序,现在有些域名可以查,比如com,net的域名可以查到。
有些类型的却查不了,比如我现在要查询cn域名的whois信息始终失败
代码:
- PHP code
<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->$query = "www.net.cn"; //要查询的域名$server = "whois.cnnic.cn"; //whois服务器地址$data = ""; //初始化最终输出的变量值$fp = @fsockopen($server, 43);fputs($fp, $query);while (!feof($fp)) { $data .= nl2br(fgets($fp, 128));}fclose($fp);echo $data;
我用工具检测了whois.cnnic.cn的43端口是开放的
奇怪为什么会输出空白呢?
是我的程序有问题?还是哪里出了问题?
------解决方案--------------------
我记得有的是可以屏蔽查询的,是不是这个问题.
------解决方案--------------------
[User:liangdong Time:18:20:36 Path:~/php]$ telnet whois.cnnic.cn 43
Trying 218.241.97.14...
Connected to whois.cnnic.cn.
Escape character is '^]'.
www.net.cn
Domain Name: www.net.cn
ROID: 20021209s10021s00003058-cn
Domain Status: clientDeleteProhibited
Domain Status: clientUpdateProhibited
Domain Status: clientTransferProhibited
Registrant ID: hc034904482-cn
Registrant Organization: 北京万网志成科技有限公司
Registrant Name: 王娟
Registrant Email: [email protected]
Sponsoring Registrar: 北京万网志成科技有限公司
Name Server:ns3.hichina.com
Name Server:ns4.hichina.com
Registration Date: 1998-10-19 00:00:00
Expiration Date: 2020-10-19 00:00:00
Dnssec Deployment: N
Connection closed by foreign host.
telnet可以,说明它呀的用\n判断结束,$query = "xxxx\n"
------解决方案--------------------
好奇怪呀!
发起会话时连握手信号都没有
就是打个电话不也要先确认一下对方是谁吗?

PHPsessionscanstorestrings,numbers,arrays,andobjects.1.Strings:textdatalikeusernames.2.Numbers:integersorfloatsforcounters.3.Arrays:listslikeshoppingcarts.4.Objects:complexstructuresthatareserialized.

TostartaPHPsession,usesession_start()atthescript'sbeginning.1)Placeitbeforeanyoutputtosetthesessioncookie.2)Usesessionsforuserdatalikeloginstatusorshoppingcarts.3)RegeneratesessionIDstopreventfixationattacks.4)Considerusingadatabaseforsessionstoragei

Session regeneration refers to generating a new session ID and invalidating the old ID when the user performs sensitive operations in case of session fixed attacks. The implementation steps include: 1. Detect sensitive operations, 2. Generate new session ID, 3. Destroy old session ID, 4. Update user-side session information.

PHP sessions have a significant impact on application performance. Optimization methods include: 1. Use a database to store session data to improve response speed; 2. Reduce the use of session data and only store necessary information; 3. Use a non-blocking session processor to improve concurrency capabilities; 4. Adjust the session expiration time to balance user experience and server burden; 5. Use persistent sessions to reduce the number of data read and write times.

PHPsessionsareserver-side,whilecookiesareclient-side.1)Sessionsstoredataontheserver,aremoresecure,andhandlelargerdata.2)Cookiesstoredataontheclient,arelesssecure,andlimitedinsize.Usesessionsforsensitivedataandcookiesfornon-sensitive,client-sidedata.

PHPidentifiesauser'ssessionusingsessioncookiesandsessionIDs.1)Whensession_start()iscalled,PHPgeneratesauniquesessionIDstoredinacookienamedPHPSESSIDontheuser'sbrowser.2)ThisIDallowsPHPtoretrievesessiondatafromtheserver.

The security of PHP sessions can be achieved through the following measures: 1. Use session_regenerate_id() to regenerate the session ID when the user logs in or is an important operation. 2. Encrypt the transmission session ID through the HTTPS protocol. 3. Use session_save_path() to specify the secure directory to store session data and set permissions correctly.

PHPsessionfilesarestoredinthedirectoryspecifiedbysession.save_path,typically/tmponUnix-likesystemsorC:\Windows\TemponWindows.Tocustomizethis:1)Usesession_save_path()tosetacustomdirectory,ensuringit'swritable;2)Verifythecustomdirectoryexistsandiswrita


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

SublimeText3 Linux new version
SublimeText3 Linux latest version

SublimeText3 Chinese version
Chinese version, very easy to use

Dreamweaver CS6
Visual web development tools

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

WebStorm Mac version
Useful JavaScript development tools
