anchor.diff:  
   ###Possible conflicts with yii2
   
  +
  +###Conflicts with php<7.2
  +#RUN composer require --prefer-stable --update-with-all-dependencies yiisoft/log 
  +
   ##Real fails
   ##RUN composer require --prefer-stable --update-with-all-dependencies yiisoft/yii-dev
   ##RUN composer require --prefer-stable --update-with-all-dependencies yiisoft/yii-twig
  
positive.code: #
  
  # Pull base image.
  FROM tamboraorg/crephpdev:2011.0
  MAINTAINER Michael Kahle <michael.kahle@yahoo.de> 
  
  ARG BUILD_YEAR=2011
  
negative.code: ## needs php 7.2 AND conflicts with yii2
  
  RUN composer require --prefer-stable --update-with-all-dependencies php-extended/php-http-message-factory-psr17
  
  RUN composer require --prefer-stable --update-with-all-dependencies yiisoft/cache
  RUN composer require --prefer-stable --update-with-all-dependencies yiisoft/di
  RUN composer require --prefer-stable --update-with-all-dependencies yiisoft/rbac
  