May 2025 - Pieter Bakker

How to Fix Missing HTTP_HOST with Nginx, HTTP/3, and PHP-FPM

ByPieter Bakker 23/05/202523/05/2025

The Problem: HTTP_HOST Disappears with HTTP/3 If you’ve recently upgraded to HTTP/3 on your Nginx server hosting WordPress or other PHP applications, you might have encountered some frustrating issues: These problems all stem from a single source: the HTTP_HOST variable goes missing when serving requests over HTTP/3, breaking critical functionality in PHP applications. Understanding the…

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