PHP无法获取Referer问题排查
测试结果:
同一个页面,2次打开,第一次能获取到Referer第二次获取不到,很好奇原因所在。
test1.php代码是:
<?phpecho <span class="str">'测试来源:直接载入页面<br/>'</span>;echo <span class="str">'<a href="test_cookie.php">进入页面</a><br/>'</span>;echo <span class="str">'测试来源:新窗口打开<br/>'</span>;echo <span class="str">'<a target="_blank" href="test_cookie.php">进入页面</a><br/>'</span>;
test_cookie.php的代码为:
<?phpdate_default_timezone_set(<span class="str">'Asia/Shanghai'</span>);<span class="rem">//设置默认时区</span>header(<span class="str">'content-type:text/html; charset=utf8'</span>);<span class="rem">//设置返回头信息</span>echo date(<span class="str">'Y-m-d H:i:s'</span>);echo <span class="str">"<br/>\r\n"</span>;echo <span class="str">'PHP获取Refer是:'</span>;$refer=isset($_SERVER[<span class="str">'HTTP_REFERER'</span>])?$_SERVER[<span class="str">'HTTP_REFERER'</span>]:<span class="str">'No refer found'</span>;echo $refer;echo <span class="str">"<br/>\r\n"</span>;echo <span class="str">'JS获取Refer是:'</span>; echo <span class="str">"<script>document.writeln(document.referrer);</script>"</span>;echo <span class="str">"<br/>\r\n"</span>;
极度好奇是什么原因造成的第一次能获取,第二次不能获取。
环境是LNMPA,官方是http://lnmp.org/lnmpa.html
Mac下用charles抓包
2次请求test1.php的header是一致的。
2次请求test_cookie.php的header是一致的。
那么问题来了,什么原因造成的2次完全一模一样的请求,PHP取不到refer。跪求解。
更多精彩话题关注小五博客http://www.lingdonge.com

PHPisusedforsendingemailsduetoitsintegrationwithservermailservicesandexternalSMTPproviders,automatingnotificationsandmarketingcampaigns.1)SetupyourPHPenvironmentwithawebserverandPHP,ensuringthemailfunctionisenabled.2)UseabasicscriptwithPHP'smailfunct

The best way to send emails is to use the PHPMailer library. 1) Using the mail() function is simple but unreliable, which may cause emails to enter spam or cannot be delivered. 2) PHPMailer provides better control and reliability, and supports HTML mail, attachments and SMTP authentication. 3) Make sure SMTP settings are configured correctly and encryption (such as STARTTLS or SSL/TLS) is used to enhance security. 4) For large amounts of emails, consider using a mail queue system to optimize performance.

CustomheadersandadvancedfeaturesinPHPemailenhancefunctionalityandreliability.1)Customheadersaddmetadatafortrackingandcategorization.2)HTMLemailsallowformattingandinteractivity.3)AttachmentscanbesentusinglibrarieslikePHPMailer.4)SMTPauthenticationimpr

Sending mail using PHP and SMTP can be achieved through the PHPMailer library. 1) Install and configure PHPMailer, 2) Set SMTP server details, 3) Define the email content, 4) Send emails and handle errors. Use this method to ensure the reliability and security of emails.

ThebestapproachforsendingemailsinPHPisusingthePHPMailerlibraryduetoitsreliability,featurerichness,andeaseofuse.PHPMailersupportsSMTP,providesdetailederrorhandling,allowssendingHTMLandplaintextemails,supportsattachments,andenhancessecurity.Foroptimalu

The reason for using Dependency Injection (DI) is that it promotes loose coupling, testability, and maintainability of the code. 1) Use constructor to inject dependencies, 2) Avoid using service locators, 3) Use dependency injection containers to manage dependencies, 4) Improve testability through injecting dependencies, 5) Avoid over-injection dependencies, 6) Consider the impact of DI on performance.

PHPperformancetuningiscrucialbecauseitenhancesspeedandefficiency,whicharevitalforwebapplications.1)CachingwithAPCureducesdatabaseloadandimprovesresponsetimes.2)Optimizingdatabasequeriesbyselectingnecessarycolumnsandusingindexingspeedsupdataretrieval.

ThebestpracticesforsendingemailssecurelyinPHPinclude:1)UsingsecureconfigurationswithSMTPandSTARTTLSencryption,2)Validatingandsanitizinginputstopreventinjectionattacks,3)EncryptingsensitivedatawithinemailsusingOpenSSL,4)Properlyhandlingemailheaderstoa


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

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment

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.

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
