php download file contains Chinese name

This article mainly introduces that the php download file contains Chinese names, which has a certain reference value. Now I share it with everyone. Friends in need can refer to it

Control Device code:

public function savefile()
    {
        //接收需要下载的文件名称
        /*if(!isset($_GET['file'])) exit('Filename is empty');
        if(empty($_GET['file'])) exit('Filename not valid');*/
        $file = I('get.file', '', 'trim');
//        $file = '/Public/upload/files/20180426/abc.zip';
//        $file = '/Public/upload/files/20180426/123.zip';


        $new_name = explode('/', $file);
        $new_name = $new_name[count($new_name) - 1];
        $file_name = $new_name;


        ob_clean();//清除一下缓冲区
        //获得文件名称
        $filename = basename(urldecode($file));
        //文件完整路径（这里将真实的文件存放在temp目录下）
//        $filePath = __DIR__."/temp/".$filename;
        $root = dirname(dirname(dirname(dirname(__FILE__))));
        $filePath = $root . $file;
        //将utf8编码转换成gbk编码，否则，文件中文名称的文件无法打开
        $filePath = iconv('UTF-8', 'gbk', $filePath);
        //检查文件是否可读
        if (!is_file($filePath) || !is_readable($filePath)) exit('Can not access file ' . $filename);
        /**
         * 这里应该加上安全验证之类的代码，例如：检测请求来源、验证UA标识等等
         */
        //以只读方式打开文件，并强制使用二进制模式
        $fileHandle = fopen($filePath, "rb");
        if ($fileHandle === false) {
            exit("Can not open file: $filename");
        }
        //文件类型是二进制流。设置为utf8编码（支持中文文件名称）
        header('Content-type:application/octet-stream; charset=utf-8');
        header("Content-Transfer-Encoding: binary");
        header("Accept-Ranges: bytes");
        //文件大小
        header("Content-Length: " . filesize($filePath));
        //触发浏览器文件下载功能
//        header('Content-Disposition:attachment;filename="'.urlencode($filename).'"');
        header('Content-Disposition:attachment;filename="' . $file_name . '"');
        //循环读取文件内容，并输出
        while (!feof($fileHandle)) {
            //从文件指针 handle 读取最多 length 个字节（每次输出10k）
            echo fread($fileHandle, 10240);
        }
//关闭文件流
        fclose($fileHandle);
    }

页面及js：
<p
 style="padding: 5px 10px 0px 5px"><span style="float: left;">{$vo.name}
 </span><a class="down" style="float: right" data-url="__ROOT__/{$vo.pic_url}" download="{$vo.pic_url}">下载</a></p>

<script>
mui(&#39;body&#39;).on(&#39;tap&#39;, &#39;.down&#39;, function () {
var url = $(this).attr("data-url");
window.location.href = &#39;__CONTROLLER__/savefile?file=&#39; + url;
});
</script>

The js here is under the mui box, h5 can be changed to click event

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