anchor.diff:  	&& apt-get install -y \
   	libbz2-dev \
   	zlib1g-dev \
  -	&& docker-php-ext-install \
  +	&& docker-php-ext-install -j$(nproc) \
   		zip \
   		bz2
   
  
positive.code: RUN apt-get update \
  	&& apt-get install -y \
  	libssl-dev \
  	&& docker-php-ext-install \
  		ftp
  
  # ssh2
  
negative.code: 	libpng-dev \
  	libgd-dev \
  	&& docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ \
  	&& docker-php-ext-install -j$(nproc) \
  		gd \
  		exif
  
  # database
  RUN docker-php-ext-install -j$(nproc) \
  	mysqli \
  	pdo \
  	pdo_mysql
  
  # strings
  RUN docker-php-ext-install -j$(nproc) \
  	gettext \
  	mbstring
  
  