php code mkdir('images','0777')创建一个拥有411权限的文件夹!为什么?

我可以发誓这是昨天的工作。但是,现在下面的代码可以毫无问题地销毁文件夹,但会在应该是777时创建一个具有411权限的新文件夹。我的代码昨天在做这个。

这样做的目的是压缩一个文件夹,传递它,删除图像,然后为图像创建一个新目录。

有人能告诉我我做错了什么或者我应该做什么吗?谢谢

function delete_directory($dirname) {
   if (is_dir($dirname))
      $dir_handle = opendir($dirname);
   if (!$dir_handle)
      return false;
   while($file = readdir($dir_handle)) {
      if ($file != "." && $file != "..") {
         if (!is_dir($dirname."/".$file))
            unlink($dirname."/".$file);
         else
            delete_directory($dirname.'/'.$file);     
      }
   }
   closedir($dir_handle);
   rmdir($dirname);
   return true;
}

$directoryToZip="jigsaw/"; // This will zip all the file(s) in this present working directory

$outputDir="/"; //Replace "/" with the name of the desired output directory.
$zipName="jigsaw.zip";

include_once("createzipfile/CreateZipFile.inc.php");
$createZipFile=new CreateZipFile;

/*
// Code to Zip a single file
$createZipFile->addDirectory($outputDir);
$fileContents=file_get_contents($fileToZip);
$createZipFile->addFile($fileContents, $outputDir.$fileToZip);
*/

//Code toZip a directory and all its files/subdirectories
$createZipFile->zipDirectory($directoryToZip,$outputDir);

/*
$rand=md5(microtime().rand(0,999999));
$zipName=$rand."_".$zipName;
*/
$fd=fopen($zipName, "wb");
$out=fwrite($fd,$createZipFile->getZippedfile());
fclose($fd);
$createZipFile->forceDownload($zipName);

@unlink($zipName);
delete_directory('jigsaw/assets/images/jigsaw_image');

mkdir('jigsaw/assets/images/jigsaw_image','0777');