如何解决php zip解压乱码的问题

<?php
$zip = new ipArchive;
$zipfile = "./test.zip";
$res = $zip->open($zipfile);
$toDir = "./test";
$s = $zip->extractTo($toDir);
print_r(scandir($toDir));
//作者：Dorm_Script
//链接：http://www.jianshu.com/p/3efa924fd809

<?php
$zip = new ipArchive;
$zipfile = "./test.zip";
$res = $zip->open($zipfile);

$toDir = "./test";
if(!file_exists($toDir)) {
 mkdir($toDir);
}
$docnum = $zip->numFiles;
for($i = 0; $i < $docnum; $i++) {
 $statInfo = $zip->statIndex($i);
 if($statInfo['crc'] == 0) {
 //新建目录
 mkdir($toDir.'/'.substr($statInfo['name'], 0,-1));
 } else {
 //拷贝文件
 copy('zip://'.$zipfile.'#'.$statInfo['name'], $toDir.'/'.$statInfo['name']);
 }
}

print_r(scandir($toDir));

//作者：Dorm_Script
//链接：http://www.jianshu.com/p/3efa924fd809

 //zip文件名
 $fileName = '中文.zip';
 //zip文件相对服务器根目录的保存路径
 $uploads_dir = "/Public/zipUpload";

 //zip文件完整的保存路径
 $zipName = $_SERVER['DOCUMENT_ROOT'].$uploads_dir.'/'.$fileName;
 //将目标路径名称赋值为fileName最后的'.zip'四个字符之外的全部字符构成的字符串
 $toDir = $_SERVER['DOCUMENT_ROOT'].$uploads_dir.'/'.substr($fileName,0,strlen($fileName)-4);

 $zip = new ipArchive;//新建一个ZipArchive的对象
 /*
 通过ZipArchive的对象处理zip文件
 $zip->open这个方法的参数表示处理的zip文件名。
 如果对zip文件对象操作成功，$zip->open这个方法会返回TRUE
 */
 $res = $zip->open(iconv ( 'UTF-8', 'GB2312', $zipName));
 if ($res === TRUE){
 if (!is_dir(iconv ( 'UTF-8', 'GB2312', $toDir))) {
 mkdir(iconv ( 'UTF-8', 'GB2312', $toDir), 0777, true);
 }
 //$zip->extractTo($toDir);
 $docnum = $zip->numFiles;
 for($i = 0; $i < $docnum; $i++) {
 $statInfo = $zip->statIndex($i);
 if($statInfo['crc'] == 0) {
 //新建目录
 mkdir(iconv ( 'UTF-8', 'GB2312', $toDir.'/'.$statInfo['name']), 0777, true);
 } else {
 //拷贝文件,特别的改动，iconv的位置决定copy能不能work
 if(copy('zip://'.iconv ( 'UTF-8', 'GB2312', $zipName).'#'.$statInfo['name'], iconv ( 'UTF-8', 'GB2312', $toDir.'/'.$statInfo['name'])) == false){
 echo 'faild to copy';
 }
 }
 }

 print_r(scandir(iconv ( 'UTF-8', 'GB2312',$toDir)));
 $zip->close();//关闭处理的zip文件
 }
 else{
 echo 'failed, code:'.$res.'<br>';
 }

Array
(
 [0] => .
 [1] => ..
 [2] => ??
 [3] => ?
)

 中文.zip
├── 不
│ └── 要
│ └── dance.txt
└── 要
 └── dance1.txt