클래스에서 생성자와 소멸자를 구별할 수 있습니다.

public function __construct(参数列表){
    ... ...
}

<?php
    class study{
        public $study1, $study2, $study3,$study4;
        public function __construct($str1, $str2, $str3,$str4){
            $this -> study1 = $str1;
            $this -> study2 = $str2;
            $this -> study3 = $str3;
            $this -> study4 = $str4;
            $this -> demo();
        }
        public function demo(){
            echo $this -> study1.&#39;<br>&#39;;
            echo $this -> study2.&#39;<br>&#39;;
            echo $this -> study3.&#39;<br>&#39;;
            echo $this -> study4.&#39;<br>&#39;;
        }
    }
    $object = new study(&#39;好好学习&#39;,&#39;天天向上&#39;,&#39;福如东海&#39;,&#39;寿比南山&#39;);
?>

public function __destruct(){
    ... ...
}

<?php
    class Website{
        public $study1, $study2;
        public function __construct(){
            echo &#39;构造函数被调用了<br>&#39;;
        }
        public function __destruct(){
            echo &#39;析构函数被调用了<br>&#39;;
        }
    }
    $object = new Website();
    echo &#39;好好学习<br>&#39;;
    echo &#39;天天向上<br>&#39;;
?>

$this -> 成员属性;
$this -> 成员方法(参数列表);

<?php
    class Website{
        public $name;
        public function __construct($name){
            $this -> name = $name;
            $this -> name();
        }
        public function name(){
            echo $this -> name;
        }
    }
    $object = new Website(&#39;好好学习&#39;);
?>