PHP가 정적 메소드인지 확인하는 방법

<?php
class Test
{
    public function wzl(){
        echo &#39;我是一个普通方法<br>&#39;;
  
    }
  
    public static function cwh(){
        echo &#39;我是一个静态方法<br>&#39;;
  
    }
  
}
$class = new Test();
$class->wzl();
$class::cwh();

$class = new Test();
$class::wzl();

$class = new Test();
$class->cwh();