What does the term Plain Old PHP Object (POPO) exactly mean?

Question

I would like to know about popo. I have searched popo and found it stands for Plain Old Php Object. But I am not sure the exact meaning of Plain Old Php Object. I want to know w

Answer 1

Its from POJO

In software engineering, a plain old Java object (POJO) is an ordinary Java object, not bound by any special restriction and not requiring any class path.

http://www.javaleaks.org/open-source/php/plain-old-php-object.html