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How to Update WordPress and PHP in a Docker Setup

Docker image

I have installed WordPress with Docker guided by this tutorial:

https://www.digitalocean.com/community/tutorials/how-to-install-wordpress-with-docker-compose

The tutorial is using this docker-compose.yml file that is using wordpress:5.1.1-fpm-alpine image:

version: '3'

services:
  db:
    image: mysql:8.0
    container_name: db
...

  wordpress:
    depends_on:
      - db
    image: wordpress:5.1.1-fpm-alpine # <-- Note the WordPress version here
    container_name: wordpress
...

Outdated WordPress version

Now, I have to install some plugins, but they are requiring some newer versions of the WordPress. Like the WP phpMyAdmin plugin:

This plugin doesn’t work with your version of WordPress. Please update WordPress.

The WordPress dashboard is displaying update notifications too:

WordPress 6.7.1 is available! Please update now.

Try to update

But when I click on the Please update now. link, I receive this error:

You cannot update because WordPress 6.7.1 requires PHP version 7.2.24 or higher. You are running version 7.2.18.

Question

How can I reliably update the WordPress along with PHP? I don’t want to mess up the whole Docker setup.

digitalocean.com

How To Install WordPress With Docker Compose | DigitalOcean

WordPress is a free and open-source Content Management System (CMS) that is widely used to launch new websites. Running WordPress typically involves installi…

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