Is it possible to install PHP7.4 on stock Alpine 3.12 Docker image?

Question

Is it possible to install PHP7.4 on stock Alpine 3.12 Docker image?

I have seen this repo and its dockerfile which is using bintray cert and repository path, but I was wondering if there is a more "standard/Alpine" way of doing this natively?

Answer 1

You can use below Docker image.

FROM alpine:3.12
RUN apk add --no-cache  --repository http://dl-cdn.alpinelinux.org/alpine/edge/community php
RUN php -v

output

Step 3/3 : RUN php -v
 ---> Running in 9900e66f4b71
PHP 7.4.7 (cli) (built: Jun 14 2020 23:46:20) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies

Answer 2

If you want to see a full fledged example it's always best to investigate the vendor's Dockerfile.

This is from image php:7.4-fpm-alpine3.12:

https://github.com/docker-library/php/blob/86c8ec4d387132b65dbe6c5ab1747f858e03852e/7.4/alpine3.12/fpm/Dockerfile

As you can see, they add a lot of stuff to ensure PHP runs smooth and startup / context problems are solved.