trait实例

代码如下

<?php
    class Person
    {
        protected $name;

        public function __construct($name='张三')
        {
            $this->name = $name;
        }

        public function study($course='语文')
        {
            return $this->name .'学习'.$course.'很努力';
        }
    }

if (!trait_exists('Course')) {
    trait Course
    {
        public $friend = '李四';

        public function sport($name='打篮球')
        {
            $this->name.'和'.$this->friend.'在'.$name;
    }

        public function hobby($name)
        {
            return $this->name.'爱好'.$name;
        }
        public function study($course = '英语')
        {
            return $this->name.'学习'.$course.'学不会';
        }
    }
}
class Student extends Person
{
    use Course;
}

    class Worker
    {
        use Course;

        private $name;

        public function __construct($name)
        {
            $this->name = $name;
        }

        public function __get($name)
        {
            return $this->$name;
        }
    }
$student = new Student();
echo $student->study().'<br>';
echo $student->hobby('打篮球').'<br>';
$worker = new Worker('小五');
echo $worker->name.'<br>';
echo $worker->hobby('打游戏');

• 运行结果