表格验证不起作用

Question

我已经获得了PHP注册表单。当用户没有填写所有必需的信息时，它应该会出现错误注册失败。

但是，当我填写所有必需的信息（用户名，密码和电子邮件）时，它仍然会导致注册失败，这是不应该做的。

这是PHP脚本：

public void test1() {
    ArrayList<ArrayList<Integer>> result = new ArrayList<>();
    ArrayList<Integer> temp = new ArrayList<>();
    ArrayList<Integer> temp2 = new ArrayList<>();
    temp.add(1);
    temp.add(2);
    result.add(new ArrayList<>(temp));
    temp.remove(temp.size() - 1);
    temp.add(1, 3);
    result.add(new ArrayList<>(temp));
}

这是HTML代码：

   function register($subuser, $subpass, $subemail){

      global $database, $form, $mailer;  //The database, form and mailer object

      /* Username error checking */
      $field = "user";  //Use field name for username
      if(!$subuser || strlen($subuser = trim($subuser)) == 0){
         $form->setError($field, "* Username not entered");
      }
      else{
         /* Spruce up username, check length */
         $subuser = stripslashes($subuser);
         if(strlen($subuser) < 3){
            $form->setError($field, "* Username below 3 characters");
         }
         else if(strlen($subuser) > 25){
            $form->setError($field, "* Username above 25 characters");
         }
         /* Check if username is not alphanumeric */
         else if(!ctype_alnum($subuser)){
            $form->setError($field, "* Username not alphanumeric");
         }
         /* Check if username is reserved */
         else if(strcasecmp($subuser, GUEST_NAME) == 0){
            $form->setError($field, "* Username reserved word");
         }
         /* Check if username is already in use */
         else if($database->usernameTaken($subuser)){
            $form->setError($field, "* Username already in use");
         }
         /* Check if username is banned */
         else if($database->usernameBanned($subuser)){
            $form->setError($field, "* Username banned");
         }
      }

      /* Password error checking */
      $field = "pass";  //Use field name for password
      if(!$subpass){
         $form->setError($field, "* Password not entered");
      }
      else{
         /* Spruce up password and check length*/
         $subpass = stripslashes($subpass);
         if(strlen($subpass) < 4){
            $form->setError($field, "* Password too short");
         }
         /* Check if password is not alphanumeric */
         else if(!ctype_alnum(($subpass = trim($subpass)))){
            $form->setError($field, "* Password not alphanumeric");
         }
         /**
          * Note: I trimmed the password only after I checked the length
          * because if you fill the password field up with spaces
          * it looks like a lot more characters than 4, so it looks
          * kind of stupid to report "password too short".
          */
      }

      /* Email error checking */
      $field = "email";  //Use field name for email
      if(!$subemail || strlen($subemail = trim($subemail)) == 0){
         $form->setError($field, "* Email not entered");
      }
      else{
         /* Check if valid email address */
         if(filter_var($subemail, FILTER_VALIDATE_EMAIL) == FALSE){
            $form->setError($field, "* Email invalid");
         }
         /* Check if email is already in use */
         if($database->emailTaken($subemail)){
            $form->setError($field, "* Email already in use");
         }

         $subemail = stripslashes($subemail);
      }

      $randid = $this->generateRandID();

      /* Errors exist, have user correct them */
      if($form->num_errors > 0){
         return 1;  //Errors with form
      }
      /* No errors, add the new account to the */
      else{
         if($database->addNewUser($subuser, md5($subpass), $subemail, $randid)){
            if(EMAIL_WELCOME){               
               $mailer->sendWelcome($subuser,$subemail,$subpass,$randid);
            }
            return 0;  //New user added succesfully
         }else{
            return 2;  //Registration attempt failed
         }
      }
   }