PHP creating the folder

Note:  $thisdir ------this is the current directery
mkdir---------creating folder



 if(mkdir($thisdir ."/upload/".$fname , 0777))
                {
                   echo "Directory has been created successfully...";
                }
                else
                {
                   echo "Failed to create directory...";
                }


or


 $thisdir= $thisdir.'/upload';
            mkdir ("/htdocs/video/upload/.$fname", 0777);