Need some clarification regarding Core PHP terminology

At https://php.earth/docs/general/difference-core-and-vanilla , the term "vanilla PHP" and "Core PHP" are clearly differentiated. But then, some other websites like https://www.tutorialspoint.com/php/php_core_vs_frameworks.htm provide unconventional definition of "Core PHP". I have written to the maintainer of tutorialspoint to fix their article but they are quite stubborn. They asked me to prove my statement and authenticity of the php.earth's article. As a solution, I am looking forward to the PHP maintainers to provide an official statement and clarification. Can anyone from PHP clarify what is the right terminology?