install packages from docker-compose.yml into docker container
To get a PHP docker container with the intl extension, you need to extend the official PHP image.
To do so, declare the use of your own Dockerfile for your PHP image in docker-compose.yml:
services: php: # Remove this line # image: php:7-fpm # Add this one instead build: './docker/php' # ...Then, add the following Dockerfile file to the docker/php folder:
FROM php:7.1-fpmRUN apt-get update && apt-get install -y \ libicu-dev \ && docker-php-ext-install \ intl \ && docker-php-ext-enable \ intlYou can now run docker-compose build to get your PHP container built with the Intl extension.
A few notes:
- I prefer to explicitly tell which PHP version I use (here "7.1.x") rather than the more generic "7.x" you defined with
php:7-fpm. - I preferred to use the
docker-php-ext-installanddocker-php-ext-enablecommand utilities provided by the PHP official image (see "How to install more PHP extensions" section in the PHP image documentation).