PHP Object-oriented explanation

Object-oriented examples

Understanding: Reducing the redefinition of variables such as variables before the Var $ idea more clearly

Class Yuan----do not add () to create class {var$banjing;//a member variable of a circle class this variable is preceded by the Var $ z variable when the object's        //area, member method    functionMianji () {return3.14*$ This->banjing*$ This-banjing; }}  Thisrefers to an object (instance) that references this class $maxyuan=NewYuan (); $maxyuan->banjing = 10;//You don't need to add any symbolic symbols to the banjing before you can have a definition in a class.//build a small circle$minyuan =NewYuan (); $minyuan->banjing = 5; Echo $maxyuan->mianji ()-$minyuan->mianji ();

Finding the area difference of two circles (object-oriented method)

Process-oriented is a process-oriented problem.

// find the area of the shadow between two circles /* $r 1 = ten; $r 2 = 5; $mj = 3.14* $r 1* $r 1-3.14* $r 2;echo $r; */

process-oriented area

The difference between a class and an object

Category 1: Abstract many objects of ambiguity

2. Object: an instance of an instance class

When using object-oriented, you must first initialize (instantiate)---> Tell the computer that it belongs to a certain class of

In the title: $maxyuan = new Yuan (); Separate a frame from the Circle class (instance independent individual (object)) Add content below (see above)

PHP Object-oriented explanation