Kesinlikle CakePHP dalmadan önce PHP documentation on classes okumak isteyeceksiniz
Resmi referanstan:
Every class definition begins with the
keyword class, followed by a class
name, which can be any name that isn't
a reserved word in PHP. Followed by a
pair of curly braces, which contains
the definition of the classes members
and methods. A pseudo-variable, $this
is available when a method is called
from within an object context. $this
is a reference to the calling object
(usually the object to which the
method belongs, but can be another
object, if the method is called
statically from the context of a
secondary object).
Tanımların çoğu uyduruk, ama bu gerçekten CakePKP'deki kod gezinmek bilmek zorunda kalacaksın şeyler değil.