🔗 Install and upgrade to PHP 8.5 on Debian and Ubuntu

With support for the Pipe syntax, new URI extension, and a healthy amount of deprecations and performance improvements, PHP 8.5 is a well polished PHP release that is now Generally-Available.

Setting up an Ubuntu or Debian server, or upgrading from a previous PHP version is a quick process that this guide aims to explain in detail, with a list of things to watch out for.

This guide is for Debian, Ubuntu, and their derivatives, and explains how to install PHP 8.5 using pre-compiled binaries. Once installed, bug fixes and security fixes can be applied easily using apt update. The rest of the article uses the PHP APT repo maintained by Ondřej Surý. Ondrej's PHP repositories have been the de-facto repositories for PHP on Ubuntu, Debian, and their derivatives for several years. The PHP

Alternately, it is possible to compile PHP from source.

TL;DR?

Looking for a quick guide without a lot of hand-holding? Head to quick summary section!