/ ***************************** / Author: old Youth E_MAIL: wenadmin@sina.com / ****** ********************** /
PHP5 has added a lot of new functions and features, but there is no reflection in the current latest CHM manual, to find it in the online manual! ! !
Not much nonsense, let's see what new Class compares the Class of PHP2 in PHP5.
1 / Add access to access: Characteristics using private / public / protected
2 / Join the interface and abstract classes, Interface / Abstract, unfortunately, the inheritance of the class is still a tree-shaped single service.
3 / You can define the final function and cannot override this function in the parent class.
4 / Finally, the static variable can be defined in the class, and can only be defined in the function in the PHP.
Static $ AA = NULLL;
Also provided a Const method
Const myStatic = 'aaaaaa';
5 / Newly provided a Self internal method
echo self :: mystatic;
6 / Added the following internal features
__construct () initialization
__destruct (); uninstall
__get (); organization returns certain variables in the class.
__set (); the organization assigns some variable values in the class.
__call (); When the function of calling the class does not exist, the method is handled
__clone (); Copy object
__sleep (); serialization
__Weekup (); when the definition is used
7 / Default Object's assignment uses the way applications, such as:
$ Object2 = $ Object1
$ Object2 gets a reference to the Object1, not in memory copy copy
8 / Provide the Reflection API, mainly used to display the structure and statistics of Class / Function, this is a brand new thing, it is difficult to say clearly, (although it is very powerful, I still don't find "this hero can be used local")
9 / Provide a enumeration function for the Class object, you can use the for loop to process global variables in the object.
10 / Provide a __autoload (); function, use to automatically load class declaration file
Details: http://www.php.net/manual/en/language.oop5.basic.php
