批改状态:合格
老师批语:
1.trait 是为单继承语言量身定制的代码复用机制
2.trait 简单理解为一个方法集合
3.trait可以看做是一个特殊的类,但不嫩被实例化,仅允许被类调用
<?php
header("content-type:text/html;charset=utf-8");
class Person
{
protected $name;
public function __construct($name='test')
{
$this->name=$name;
}
public function study($course='progamming')
{
return $this->name.' is studing'.$course;
}
}
trait Course
{
public $friend='john';
public function sport($name='mysql')
{
$this->name.$this->friend.' is studing'.$name;
}
abstract public static function hobby($name);
public function study($course ='html')
{
return $this->name.'is studing'.$course;
}
}
class Student extends Person
{
use Course;
protected $name='test1';
public static function hobby($name)
{
return $name;
}
public function study($course='java')
{
return $this->name.' is studing '.$course;
}
}
$student = new Student();
echo $student->study();点击 "运行实例" 按钮查看在线实例
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