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The examples in this article describe the functions and usage of PHP Trait. Share it with everyone for your reference, the details are as follows:
Trait is a code reuse mechanism prepared for single inheritance languages like PHP.
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();
Running result:
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();
Running result:
Fatal error: Call to protected method People::say() from context '' in D:\phpdemo\trait_Demo.php on line 14
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