anchor.diff:  
   # pcntl
   RUN cd /usr/local/src \
  -    && cd php-7.1.26/ext/pcntl \
  +    && cd php-7.1.30/ext/pcntl \
       && phpize \
       && ./configure \
       && make \
  
positive.code: 
  # gettext
  RUN cd /usr/local/src \
      && cd php-7.1.26/ext/gettext \
      && phpize \
      && ./configure \
      && make \
  
negative.code:     libmcrypt-dev \
  # for soap
      libxml2-dev \
  # for postgresql
      libpq-dev \
  # for mongodb
      libssl-dev \
  # for swoole $server->connections
  