PHP Trait特性

php类的单继承性,无法同时从两个基类中继承属性和方法,为了解决这个问题,使用Trait特性解决.
用法：通过在类中使用use 关键字,声明要组合的Trait名称,具体的Trait的声明使用Trait关键词.  注意:Trait不能实例化

demo示例:

 1 <?php
 2 trait Dog{
 3     public function dog(){
 4     echo ‘This trair dog‘;
 5     }
 6 }
 7
 8 trait Fish{
 9     public function fish(){
10     echo ‘This trair fish‘;
11     }
12 }
13
14
15 class Animal{
16     public function name(){
17         echo ‘This is animal‘;
18     }
19 }
20
21 class Cat extends Animal{
22     use Dog,Fish;
23     public function eat(){
24         echo ‘This is animal cat eat‘;
25     }
26 }
27
28 $data = new Cat();
29 $data->name();//This is animal
30 echo ‘<pre>‘;
31 $data->eat();//This is animal cat eat
32 echo ‘<pre>‘;
33 $data->dog();//This trair dog
34 echo ‘<pre>‘;
35 $data->fish();//This trair fish

结果打印:

原文地址：https://www.cnblogs.com/cxx8181602/p/9815669.html