PHP Trait功能与用法实例分析

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();

<?php
trait Test {
 public function say() {
  echo 'say hello';
 }
}
 
class People {
 use Test { say as protected; }
}
 
$people = new People();
 
$people- say();