OOP in PHP

There is a very close similarity between ASP.NET and PHP OOP concept.
Whenever you call a method through object in ASP.NET it looks like this object.SomeMethod();
And in PHP it looks like object->SomeMethod();
Moreover there are many help from PHP in-built classes from PHP 5 onwards that was not available in PHP 4+.
For further reading about Object Oriented PHP (OOP), You may refer to 12 reach