Earlier quoted context omitted.
PHP is much more of a static language than a dynamic one. Therefore it has more in common with Java/C++ than with Python, Ruby, or JavaScript. It's also a very pragmatic choice for an OO system.
PHP wasn't always what it is now, that's OPs point. They are where they chose to go. Probably in the search of legitimacy, they chose to follow the most enterprisey language.
PHP is heavily based on C so choosing to make it's OOP features like C++ isn't a big leap.
Plus PHP is still far less enterprisey than Java so maybe the OO model isn't the real issue.