13.php面向对象

<?php
class Person {
    public $age = 12;
    public function __construct() {
        echo ‘show‘;
    }
    public function __destruct() {
        
    }
    // 调用方法
    public function showMe() {
        $this->age += 20;
    }
    
}

// 子类继承父类
class Student extends Person {    
    /* (non-PHPdoc)
     * @see Person::showMe()
     */
    public function showMe() {
        $this->age += 100;    
    }
}
//初始化对象
$per = new Person();
echo ‘<br />‘;
echo $per->age;
echo ‘<br />‘;
//调用方法
$per->showMe();

echo $per->age;
echo ‘<br />‘;
?>