Learn - Programming languages

Learn to code in different programming languages. The same line of code but in different languages:

1. Variables (PHP, JavaScript, Python).
2. Collections (PHP, JavaScript, Python).
3. Conditionals (PHP, JavaScript, Python).
4. Loops (PHP, JavaScript, Python).
5. Functions (PHP, JavaScript, Python).
6. Classes (PHP, JavaScript, Python).
7. Libraries (PHP, JavaScript, Python) - Geometry - Custom library (PHP, JavaScript, Python).

I use it only for didactic purposes, it does not cover all the characteristics of each language.