编辑代码

<?php 
// 只读类
readonly class WebSite
{
   public function __construct(public string $webName = '', public string $webUrl = '')
   {
   }
}
$webSite = new WebSite('自如初', 'www.ziruchu.com');
// 为只读属性赋值，会报错
echo $webSite->webName;