本文实例讲述了PHP Trait功能与用法。分享给大家供大家参考，具体如下：
Trait 是为类似 PHP 的单继承语言而准备的一种代码复用机制。
1.如果引入的Trait有同名的方法
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trait A{ public function eat(){ echo 'A-eat'; } public function say(){ echo 'A-say'; }} trait B{ public function eat(){ echo 'B-eat'; } public function say(){ echo 'B-say'; }} class People{ use A,B{ A::eat insteadof B; B::eat as eatbak; B::say insteadof A; }} $people = new People();$people->eat();echo "<br/>";$people->say();echo "<br/>";$people->eatbak(); |
运行结果：
A-eat
B-say
B-eat
2.修改访问控制
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<?phptrait Test { public function say() { echo 'say hello'; }} class People { use Test { say as protected; }} $people = new People(); $people->say(); |
运行结果：
Fatal error: Call to protected method People::say() from context '' in D:\phpdemo\trait_Demo.php on line 14
希望本文所述对大家PHP程序设计有所帮助。
原文链接：https://blog.csdn.net/huangyuxin_/article/details/84885115
