Question

首先，我必须告诉我我是php的新手。我正在尝试使用jqueryValidation引擎插件验证注册表单。我成功验证了一些部分，现在我被困在用户名验证部分（检查用户输入的名称是否已经存在于数据库中，如果是，则显示＆＃39;用户名已被采用＆＃39;）。当我输入用户名＆＃39;验证时请等待＆＃39;提示正在显示，我无法提交表单。我使用过bootstrap 3.3.6。

这是我的注册表格

<div class="modal fade" id="signupForm" data-backdrop="false" role="dialog">
    <div class="modal-dialog">
        <div class="modal-content Popmodal">
            <div class="modal-header">
                <button type="button" class="close Popclose" data-dismiss="modal" aria-label="">
                    <span>&times;</span>
                </button>
                <h4 class="modal-title Poptit">Sign Up</h4>
            </div>

            <div class="modal-body Popbody">
                <div id="error">
                    <!-- error will be showen here ! -->
                </div>
                <form class="form-horizontal" method="post" action="registration.php" id="reg-form">
                    <div class="form-group"><br>
                        <label class="col-md-4 col-md-offset-1">User Name :</label>
                        <div class="col-md-5">
                            <input type="text" placeholder="A name that you like to use" value = "" class="form-control input-sm popname validate[required,custom[onlyLetterNumber],maxSize[20],ajax[ajaxUserCallPhp]]" name="uname" id="uname" data-errormessage-value-missing="Username is required !" data-prompt-position="bottomLeft:5,4"><br>

                        </div>
                    </div>

                    <div class="form-group">
                        <label class="col-md-4 col-md-offset-1">Email :</label>
                        <div class="col-md-5">
                            <input type="email" placeholder="Your email address" class="form-control input-sm popname validate[required,custom[email]]" name="mail" id="mail" data-errormessage-value-missing="Email is required !"  data-errormessage-custom-error="Invalid email address !" data-prompt-position="bottomLeft:5,4"><br>
                        </div>

                    </div>

                    <div class="form-group">
                        <label class="col-md-4 col-md-offset-1">Password :</label>
                        <div class="col-md-5">
                            <input type="password" maxlength="15" placeholder="Password" class="form-control input-sm popname validate[required]" name="pass" id="pass" data-errormessage-value-missing="Password is required !"  data-prompt-position="bottomLeft:5,4"><br>
                        </div>
                    </div>

                    <div class="form-group">
                        <label class="col-md-4 col-md-offset-1">Confirm Password :</label>
                        <div class="col-md-5">
                            <input type="password" maxlength="15" placeholder="Confirm password" class="form-control input-sm popname validate[required,equals[pass]]" name="cpass" id="cpass" data-errormessage-value-missing="Confirm password is required !" data-errormessage-pattern-mismatch="Password fields do not match !" data-prompt-position="bottomLeft:5,4"><br>
                        </div>
                    </div>

                    <div class="form-group">
                        <div class="col-md-2 col-md-offset-8">
                            <button type="submit" class="btn btn-success sign" value="submit" name="signup">Sign Up</button>
                        </div>
                    </div>
                 </form>
            </div>
        </div>
    </div>
</div>

这是js部分

  <script>
    $(document).ready(function(){
    $("#reg-form").validationEngine();
  });
  </script> //this part is on the index page with signup form

"ajaxUserCallPhp": {
                "url": "ajaxValidateFieldUser.php",
                "extraDataDynamic": ['#uname'],
                "alertTextOk": "* This username is available",
                "alertText": "* This user is already taken",
                "alertTextLoad": "* Validating, please wait"
            }

这是php代码

<?php

  $validateValue=$_REQUEST['fieldValue']; 
  $validateId=$_REQUEST['uname'];


  $validateError= "This username is already taken";
  $validateSuccess= "This username is available";

   $arrayToJs = array();
   $arrayToJs[0] = $validateId;

   require_once('dbconfig.php');

   $stmt = $db_con->query('SELECT uname FROM users WHERE uname    ='$validateValue'');
   $stmt->bindValue(':uname', $uname, PDO::PARAM_STR);
   $stmt->execute();
   $res = $stmt->fetchAll(PDO::FETCH_ASSOC);

   if ($res->fetchColumn() > 0) { 
   $arrayToJs[1] = false;
   echo json_encode($arrayToJs); // RETURN ARRAY WITH ERROR

   } else{

    $arrayToJs[1] = true;
    echo json_encode($arrayToJs); // RETURN ARRAY WITH success
   }

  ?>

Answer 1

让我们从这里开始：

-l

您的报价已完全损坏，因此该文件甚至无法解析。即使有了这个问题，仍然存在许多问题。

以下是关于如何进行基本查询的documentation。简而言之，准备然后执行。对于简单的$stmt = $db_con->query('SELECT uname FROM users WHERE uname = '$validateValue''); $stmt->bindValue(':uname', $uname, PDO::PARAM_STR); $stmt->execute(); $res = $stmt->fetchAll(PDO::FETCH_ASSOC);查询，绑定通常是不必要的，并且调用SELECT对预处理语句完全没有任何作用。试试这个：

PDO::query()

然后$stmt = $db_con->prepare('SELECT uname FROM users WHERE uname = :uname'); $stmt->execute(["uname"=>$validateValue]);返回一个数组，但您尝试在其上调用PDOStatement::fetchAll()。选择其中一个。

还有其他问题，但您应该逐行查看代码并了解每行的功能。你不能希望从六个网站复制和粘贴东西并使其有效。

我试图通过使用jqueryValidation引擎插件验证注册表单一些验证无法正常工作

1 个答案: