PHP无法从界面扩展？

Question

我在下面写一个php文件.

<?php
interface people
{
    public function take($s);
}

class engineer extends people
{
    public function take($s){
        echo $s;
    }
}
?>

人是一个界面,工程师扩展人.但是,当我运行此代码时,错误:

Fatal error: Class engineer cannot extend from interface people in E:\php5\Mywwwroot\b.php on line 12

发生了什么？我的PHP版本是5.4.

Answer 1

您实现接口和扩展类:

<?php
interface people
{
    public function take($s);
}

class engineer implements people
{
    public function take($s){
        echo $s;
    }
}
?>

Answer 2

extends 用于扩展另一个类.

对于接口,您需要使用implements.

(extend虽然接口可以是另一个接口)