PHP 魔术常量 trait 实例 - 自学教程(runoops.com)

xxxxxxxxxx
 
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>PHP 魔术常量 trait  实例 - 自学教程(runoops.com)</title>
</head>
<body>
​
<?php
class Base {
    public function sayHello() {
        echo 'Hello ';
    }
}
 
trait SayWorld {
    public function sayHello() {
        parent::sayHello();
        echo 'World!';
    }
}
 
class MyHelloWorld extends Base {
    use SayWorld;
}
 
$o = new MyHelloWorld();
$o->sayHello();
?>
​
</body>
​
</html>