PHP code fro remove file from directory

$str = 'C:/xampp/htdocs/demos/j'; //path
 function recursiveDelete($str){
       if(is_file($str)){
           return @unlink($str);
       }
       elseif(is_dir($str)){
          $scan = glob(rtrim($str,'/').'/*');
          //print_r($scan);
           foreach($scan as $index=>$path){
         
               recursiveDelete($path);
           }
           return @rmdir($str);
       }
   }

recursiveDelete($str);
mkdir($str);//re-create directory