Installing GD in Docker

Question

I am a complete Docker novice but am having to maintain an existing system. The Dockerfile I am using is as below:

FROM php:5.6-apache

RUN docker-php-ext-in         


        

Answer 1

It is not the case of the OP, but I found that for those that are using php:7.4-fpm-alpine the syntax is a bit different

FROM php:7.4-fpm-alpine

# ... Other instructions ...

# Setup GD extension
RUN apk add --no-cache \
      freetype \
      libjpeg-turbo \
      libpng \
      freetype-dev \
      libjpeg-turbo-dev \
      libpng-dev \
    && docker-php-ext-configure gd \
      --with-freetype=/usr/include/ \
      # --with-png=/usr/include/ \ # No longer necessary as of 7.4; https://github.com/docker-library/php/pull/910#issuecomment-559383597
      --with-jpeg=/usr/include/ \
    && docker-php-ext-install -j$(nproc) gd \
    && docker-php-ext-enable gd \
    && apk del --no-cache \
      freetype-dev \
      libjpeg-turbo-dev \
      libpng-dev \
    && rm -rf /tmp/*

# ... Other instructions ...