Opencart illegally stripping license and attribution from reused code

The reaction is far worse than the license violation. It really undermines any credibility the project for being "professional and reliable".

While the author does react quite unprofessionally, there has been a commit adding the license to the required position: https://github.com/opencart-ce/opencart-ce/commit/dfaf2e8fb4...

OpenCart-CE is a community-edition fork, not the official repo.

The license is for calling two functions?

Is it really a function with a single line of code? O_o

A function can be licensed in the same respect as a class or library.