php遍曆中文目錄出現問題

php

$path= iconv ( "UTF-8", "GBK", $path);
if(!is_dir ( $path )){
echo "你輸入的路徑不是目錄，請檢查後重新輸入！";
}
$file = opendir ( $path );
while ( $flist = readdir ( $file ) ) {
// 去除.和..
if ($flist == '.' || $flist == '..')
continue;
$filename = $path . '/' . $flist;
$name = iconv ( "GBk", "UTF-8", $filename );
if (is_dir ( $filename )) {
$this->readDir ( $filename );
} else {
$filename = iconv ( "GBk", "UTF-8", $filename );
echo $filename ;
}
}

在win7中可以遍曆中文目錄，在windows server 2003 輸出的是你輸入的路徑不是目錄，請檢查後重新輸入！
是什麼原因

