anchor.diff:      then \
         apt-get update && apt-get install pkg-config libmagickwand-dev -yq; \
     fi
  +
  +# Configure PHP extensions.
  +RUN rm -rf /var/lib/apt/lists/* \
  +    && docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
  +    && docker-php-ext-install gd json hash iconv intl mbstring mcrypt mysqli opcache pcntl pdo pdo_mysql pdo_pgsql simplexml soap xml xsl zip
   
   # Set recommended PHP.ini settings.
   # See https://secure.php.net/manual/en/opcache.installation.php
  
positive.code: RUN a2ensite 000-default
  
  # Install the PHP extensions we need.
  RUN apt-get update && apt-get install -y libcurl4-openssl-dev libicu-dev libmcrypt-dev libpng12-dev libjpeg-dev libpq-dev libxml2-dev libxslt-dev \
      && rm -rf /var/lib/apt/lists/* \
      && docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
      && docker-php-ext-install gd json hash iconv intl mbstring mcrypt mysqli opcache pcntl pdo pdo_mysql pdo_pgsql simplexml soap xml xsl zip
  
  # Installs for specific PHP versions.
  RUN PHP_MAJOR_VERSION=$( echo "${PHP_VERSION}" | cut -f1 -d "." ) && \
  
negative.code: FROM php:7-apache
  
  # RUN apt-get update --fix-missing -qq \
  #   && apt-get upgrade -f -y \
  