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Discover how to fix the `HTTP 405` error encountered on WordPress when accessing `wp-comments-post.php`. Learn the correct techniques to allow commenting while managing errors effectively.
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This video is based on the question https://stackoverflow.com/q/63380127/ asked by the user 'Mert VAROL' ( https://stackoverflow.com/u/13739536/ ) and on the answer https://stackoverflow.com/a/63631771/ provided by the user 'MrWhite' ( https://stackoverflow.com/u/369434/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Resolving the HTTP 405 Error on WordPress: A Comprehensive Guide

If you've encountered an HTTP 405 error when trying to access the URL https://example.com/wp-comments-post.php on your WordPress site, you're not alone. This error tends to arise when the expected conditions for accessing a specific script are not met. Specifically, it indicates that the method of request used (like GET) is not allowed by the server for that particular resource. In this guide, we will explore why this error occurs and how you can effectively resolve it, allowing for a smooth commenting experience on your site.

Understanding the HTTP 405 Error

The HTTP 405 error stands for “Method Not Allowed”. You might see this error when you attempt to directly access wp-comments-post.php through a browser. Here’s why this happens:

Request Type: The comments script is designed to accept only POST requests. When you try to access it through a browser (which uses a GET request), it results in a 405 error.

Server Behavior: This behavior is by design, built into how WordPress handles comment submissions.

Why Your 404 Redirect Isn’t Working

You've also attempted to add a 404 redirect to your .htaccess file, but you're still encountering the 405 error. Let’s break down why this approach may not work in this context:

Redirect Misconception: Simply adding an error document entry to handle the 405 error won’t resolve the underlying issue because the request is handled at the PHP level, not the Apache level.

302 Redirect Issue: By using an absolute URL for your error document, you inadvertently set up a 302 temporary redirect instead of serving an internal error document, which could lead to confusion and further issues.

The Correct Approach to Handle Comments

To allow users to comment while properly managing error responses, it’s essential to handle your server configuration correctly. Here’s how to do it:

Update .htaccess to Handle Requests Correctly

Instead of blocking all requests or trying to redirect, you should only block certain types of requests. Here’s the recommended way to adjust your .htaccess file:

Add Rewrite Rules: Place the following code at the top of your .htaccess file, before any existing WordPress directives:

[[See Video to Reveal this Text or Code Snippet]]

Explanation: This code checks if the request method is not POST; if true, it returns a 404 response specifically for wp-comments-post.php.

Customize the Response if Needed: If you aim to customize the 405 response, you can adjust your rewrite condition as follows:

[[See Video to Reveal this Text or Code Snippet]]

Outcome: This configuration will serve a custom error page for 405 errors while still allowing comment submissions via POST requests.

Conclusion

In summary, the HTTP 405 error encountered when accessing the wp-comments-post.php file in WordPress is due to the nature of web request methods. By ensuring that you properly configure your .htaccess file to differentiate between request methods, you can prevent confusion and allow users to comment without issues. Now, you can maintain a seamless commenting experience on your WordPress site while effectively managing error responses.

Feel free to apply these adjustments and watch as your WordPress site's functionality improves, allowing both users and admins to interact without unnecessary hindrances. If you have any further questions about WordPress configurations, don't hesitate to reach out!