How to install php-redis extension using the official PHP Docker image approach?

Question

I want to build my PHP-FPM image with php-redis extension based on the official PHP Docker image, for example, using this Dockerfile: php:5.6-fpm.

The docs

Answer 1

Based on @starikovs answer. I added a variable for docker style.

# install phpredis extension
ENV PHPREDIS_VERSION 2.2.7

RUN curl -L -o /tmp/redis.tar.gz https://github.com/phpredis/phpredis/archive/$PHPREDIS_VERSION.tar.gz \
    && tar xfz /tmp/redis.tar.gz \
    && rm -r /tmp/redis.tar.gz \
    && mv phpredis-$PHPREDIS_VERSION /usr/src/php/ext/redis \
    && docker-php-ext-install redis