[suspicious - maybe spam] [PHP] [suspicious - maybe spam] Categories and subcategories

[Phpu]

Hi,
I need to create multiple categories and subcategories using php and mysql. 
Something like that

- category 1
    - subcat 1.1
    - subcat 1.2
          - subcat 1.2.1
          - subcat 1.2.2
- category 2
------------------------

Does anyone know a godd totorial how to create this in pahp and how to make the 
structure of the database?

Thanks in advance for your help !!!!