About object-oriented PHP - the definition of classes, the instantiation operations of objects, and the special usage of constructors and destructors - WORSHIP Yasa

Class definition and object instantiation operation

<?php 
//类里面的成员是属于对象的
class Hero{
    public $name;//成员变量
    //成员属性(存在于强类型语言中)
    protected $blood;
    private $attack;
    //成员方法
    function skill(){
        echo "$this->name<br>control";        
    }
}
$s = new Hero();//造一个英雄
$s->name = "Riven";  //给英雄赋值 
echo "$s->name<br>";//输出英雄名
$s->skill();

Constructor, destructor

//作用：对类里面的某些成员进行初始化(参数自定义初始值)
class Ren {
    public $name;
    public $age;
    //强类型语言中使用类型
//老版本定义用法 
/* public function Ren() {
    echo "正在构造函数";
    public function Ren($v) {
    $this->age = $v;*/
    //PHP新版本定义用法 
    public function __construct($v) {
    $this->age = $v;
}
public function __destruct() {
    echo "正在销毁文件";
}
}$s = new Ren(20);
    echo $s->age;
    ?>

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