$SAVE_DIR = "/home1/**/**/uploads/mon_4/";
  foreach ($_FILES["b"]["error"] as $key => $error) {
    if ($error == UPLOAD_ERR_OK) {
        $allow_ext = array('jpg','jpeg','png','gif','JPG','JPEG','PNG','GIF');
        $fname = explode(".", $_FILES['b']['name'][$key]);
        $ext = strtolower($fname[count($fname)-1]);
          if(!in_array($ext, $allow_ext)) {
            echo "<script>
            alert('업로드할수 없는 파일입니다.');
            </script>";
            exit;
          }
        $tmp_name = $_FILES["b"]["tmp_name"][$key];
        $_FILES["b"]["name"][$key] = time().$key.".".$ext;
        $name = time()."_".$_FILES["b"]["name"][$key];
        $savefile = $SAVE_DIR.$name;
        move_uploaded_file($tmp_name, $savefile);
    }//if end
  }//foreach end
   for($i=0;$i<count($week);$i++)
    {
      $name = time()."_".$_FILES["b"]["name"][$i];
      $sql = "insert into test
      set week = '{$week[$i]}',
        a = '{$a[$i]}',
        b = 'http://**.co.kr/**/uploads/mon_4/{$name}',
        c = '{$a[$i]}'";
      sql_query($sql) or die (sql_error());
    }