php8.1会报错

PHP8.1以上会报精度问题的错误, 有空修复一下吧, 大佬
Implicit conversion from float 69.0928270042194 to int loses precision

 # 创建新的背景画布
        if($height>=$thumb_h){
            $thumb=imagecreatetruecolor($width,$thumb_h);
        }else{
            $thumb=imagecreatetruecolor($width,$height);
            $thumb_h=$height;
        }