I want to make my PhD in my country (Poland) with the PhD scholarship from abroad (an international institution, international school etc). Do You think it is possible to get such a scholar? Do You know any source of such kind of funding?

Educational scholarships for PhDs are usually offered to people who wish to study in the country supplying the money or for a resident of that country to study abroad. The way you suggest is unusual, you could try writing to the foreign embassy in Poland to ask if their country has such a scheme for Polish citizens.

Thank You for the advice.
In Poland there is a school which gives a PhD scholarship and if accepted a student has to attend a meeting twice a year and give reports from time to time. I am looking for sth similar but in international scale.