php实现关于var_dump和echo输出多变量的测试

<?php
trait  A{
	public $a = &#39;a&#39;;
	private $d = &#39;d&#39;;
	public function sayHello(){
		echo &#39;Hello &#39;;
	}
}


class B{
	public $b = &#39;b&#39;;
	public function sayHello(){
		return &#39; world !&#39;;
	}
}


class C extends B{
	use A;


	public $b = &#39;c&#39;;
	
}
var_dump(5,7,(new C)->sayHello(),aac(4,5),&#39;<br />&#39;);


echo 5,7,(new C)->sayHello(),aac(4,5),&#39;<br />&#39;;


function aac($a,$b){
	echo &#39;<hr />&#39;;
	echo $a,$b;
	echo &#39;<hr />&#39;;
	echo $a+$b;
	echo &#39;<hr />&#39;;
	return $a+$b;
}