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HomeBackend DevelopmentPHP TutorialHow to Capture Specific URL Segments for 301 Redirects on Windows/IIS Servers with PHP?

How to Capture Specific URL Segments for 301 Redirects on Windows/IIS Servers with PHP?

Retrieving the Current Page URL on Windows/IIS Servers for PHP Redirects

In scenarios where WordPress installations are migrated to new folders on Windows/IIS servers, setting up 301 redirects in PHP encounters challenges in capturing the URL's specific segment. This article explores the issue and provides a solution for obtaining the desired URL portion.

The Problem: Empty Strings and Truncated Values

Commonly suggested solutions, such as using $_SERVER["REQUEST_URI"], yield empty strings on IIS servers. Similarly, $_SERVER["PHP_SELF"] only returns "index.php," omitting the crucial "/post-title/" segment of the URL.

The Solution: Harnessing $_SERVER['PATH_INFO']

IIS servers provide an alternative variable, $_SERVER['PATH_INFO'], which resolves this issue effectively. This variable retrieves the requested resource's path relative to the server's installed root directory.

In the example provided, where URLs follow the format "/OLD_FOLDER/index.php/post-title/", $_SERVER['PATH_INFO'] would yield "/post-title/". This value can then be utilized to construct the desired redirect paths.

Conclusion

By leveraging $_SERVER['PATH_INFO'] in IIS environments, developers can accurately capture the URL segments required for 301 redirects, ensuring seamless website migrations and proper redirection of traffic from old to new URLs.

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