After successfully uploading a file with a Chinese name, the file cannot be opened because the file name is found to be garbled when opening the file. How to solve the problem?

Question

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<?php    
    if($_FILES["file"]["error"]){
        echo "<script>alert('没有选择文件！');location.href='http://127.0.0.1:88/seek_system/admin/help/wenjianceshi.php'</script>";
    }else{
        if(($_FILES["file"]["size"]<10240000)and($_FILES['file']['type']=='application/pdf'))
        {
            //防止文件名重复
            $filename="./upfile/".date('YmdHis',time()+8*60*60).'-'.$_FILES["file"]["name"];
            //转码
            $filename=iconv("UTF-8","gb2312",$filename);   
            if(file_exists($filename)){           
                echo "该文件已存在";
            }else{                        
                //保存文件
                move_uploaded_file($_FILES["file"]["tmp_name"],$filename);
                echo "<script>alert('上传成功！');location.href='http://127.0.0.1:88/seek_system/admin/help/wenjianceshi.php'</script>";
            }
        }else{    
            echo "<script>alert('只能上传PDF文件！');location.href='http://127.0.0.1:88/seek_system/admin/help/wenjianceshi.php'</script>";
        }
    }

The code for uploading files is as above. When I uploaded a file containing a Chinese name, I was able to successfully upload the file after transcoding, and found that the uploaded file name could also be displayed correctly in Chinese. However, the problem was that I could not open the file by clicking on the file name, and found the file name in the address bar. The Chinese part is garbled. How can I solve the problem that after transcoding, the file will have a Chinese name and the file can be opened normally?

Answer 1

Try using gbk encoding when saving the file name, then read the file name and convert it to utf8

Answer 2

如果我把$filename=iconv("UTF-8","gb2312",$filename);换成了$filename=iconv("gb2312","UTF-8",$filename);
发现上传成功后可以正常打开文件了，但是又出现了在浏览器上显示的文件名是乱码的。
请问结合我上面发的，这个问题该怎么解决呢？有好解决方法的请赐教。