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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。
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
<?php trait 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
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