php类的继承与访问

最新推荐文章于 2024-11-23 10:10:20 发布

原创最新推荐文章于 2024-11-23 10:10:20 发布 · 127 阅读

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1.环境搭建

测试环境WampServer2.5继承环境

下载地址：http://rj.baidu.com/soft/detail/10636.html?ald

2.定义父类

class Father{
    public function demo1(){
       
        return demo1;
    }

    public static function demo2(){
       
        return demo2;
    }
}

3.定义子类

class son extends Father
{

}

4.访问

echo son::demo1();
//Strict standards: Non-static method Father::demo1() should not be called statically in E:\Develop\wamp\www\test.php on line 24
//Notice: Use of undefined constant demo1 - assumed 'demo1' in E:\Develop\wamp\www\test.php on line 11

echo son::demo2();
//Notice: Use of undefined constant demo2 - assumed 'demo2' in E:\Develop\wamp\www\test.php on line 16


$obj = new Son();
echo $obj -> demo1();
//Notice: Use of undefined constant demo1 - assumed 'demo1' in E:\Develop\wamp\www\test.php on line 11


$obj = new Son();
echo $obj -> demo();
//Notice: Use of undefined constant demo2 - assumed 'demo2' in E:\Develop\wamp\www\test.php on line 16

5.注意

当然注释部分是访问中出现的经过，可以忽略不计，如你需要做处理的话在语句加一个@符号即可