Declaration and use of php classes

* Description of Girlfriend

* Requirements:

* 1. The class declaration code should create a separate php file

* 2. The class name must be the same as the class file The name is the same

* 3. You must use the namespace (have not learned it yet, I will talk about it later)

*

* The current class has a total of 5 members: 3 attributes, 2 A method

* Attributes are variables declared in the class, and the naming rules are exactly the same as ordinary variables

* Methods are functions declared in the class, and the naming and usage rules are exactly the same as ordinary functions

* Since it is defined in a class, there are some special features compared with ordinary variables and functions, such as access control

* Class member access control, also called external visibility, is currently not restricted External access, set to public (default)

class GirlFriend1 { //类属性:$name 姓名 public $name = '冰冰姐'; //类属性: 年龄 public $age = 18; //类属性: 身材三维stature['stætʃə]: 胸,腰,臀 public $stature = [90,80,90]; //类方法: getInfo() 获取女友姓名和年龄 public function getInfo($name='',$age=0) { //对象属性初始化 $this->name = empty($name) ? $this->name : $name; $this->age = ($age==0) ? $this->age : $age; //返回当前对象的name与age属性值 return '姓名:'.$this->name.',年龄:'.$this->age.'
'; } //类方法: getStature() 获取女友身材信息 public function getStature($stature=[]) { //对象属性初始化 $this->stature = empty($stature) ? $this->stature : $stature; return '胸围:'.$this->stature[0].',腰围:'.$this->stature[1].',臀围:'.$this->stature[2].'
'; } }