实例
<?php
/**
* Created by PhpStorm.
* User: 金超
* Date: 2018/5/8
* Time: 9:52
*/
//先创建一个父类
if(!class_exists('engineer')) {
class engineer
{
protected $name;
public function __construct($name='kim')
{
$this->name=$name;
}
public function duty($lang='php')
{
return $this->name.'的职责是写'.$lang;
}
}
}
//第一个trait
if(!trait_exists('Mission')){
trait Mission
{
public $boss='Jack';
public function task($job='写网页')
{
return $this->boss.'给'.$this->name.'下达了'.$job.'的任务';
}
}
}
//再写一个trait
if(!trait_exists('Recess'))
{
trait Recess
{
public $leader='Rose';
public function task($day='三'){
return $this->leader.'觉得'.$this->name.'工作太辛苦了，于是给'.$this->name.'放了'.$day.'天假';
}
}
}
//子类
if(!class_exists('programmer'))
{
class programmer extends engineer
{ //子类支持导入多个trait类,方法重名的话用下列方法解决
use Mission,Recess{
//重名的task 用Mission::task代替掉Recess::task
Mission::task insteadof Recess;
//在用holiday代替Recess::task
Recess::task as holiday;
}
}
}
//实例化子类
$programmer=new programmer();
//调用父类中的方法
echo $programmer->duty();
echo'<hr style="color:aquamarine">';
//访问trait类中的方法
echo $programmer->task();
echo'<hr style="color:blueviolet">';
//调用trait中重名的方法
echo $programmer->holiday();
echo'<hr style="color:cornflowerblue">';运行实例 »
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实例
