Javascript 所有变量似乎都没有被过帐

我目前正在一个网站上工作，该网站以引导模式（addStudentModal.php）从表单中获取信息，并通过jQuery脚本（dataManageFunctions.js）将其发送到createRecord.php。当数据到达createRecord.php时，它会被插入到MySQL数据库中。出于调试目的，我没有执行INSERT命令，而是让它回显发布到它的变量。我发现除了2个字段外，其他所有字段都没有发布，我完全不知道为什么。具体地说，gYear和lName是回显空白值。我检查了拼写，并试图确保变量名和ID是相同的。也许我错过了什么，我不知道

有关文件如下：

addStudentModal.php

<!-- ADD STUDENT Modal -->
<div class="modal fade" id="addStudentModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
        <h4 class="modal-title" id="myModalLabel">Add New Student</h4>
      </div>
      <div class="modal-body">
          <div id="additionResults"></div>
          <!-- EDIT form-->
          <form role="form" action="" method="" id="addStudentForm">
              <div class="form-group">
                  <label for="studentID">Student ID Number:</label>
                  <input type="text" class="form-control" name="studentID" id="studentID" placeholder="123456">
              </div>
              <div class="form-group">
                  <label for="lastName">Graduation Year:</label>
                  <input type="text" class="form-control" name="gradYear" id="gradYear" placeholder="0">
              </div>
              <div class="form-group">
                  <label for="lastName">Last Name:</label>
                  <input type="text" class="form-control" name="lastName" id="lastName" placeholder="Doe">
              </div>
              <div class="form-group">
                  <label for="firstName">First Name:</label>
                  <input type="text" class="form-control" name="firstName" id="firstName" placeholder="John">
              </div>
              <div class="form-group">
                  <label for="serHrsToDate">Service Hours to Date:</label>
                  <input type="text" class="form-control" name="serHrsToDate" id="serHrsToDate" placeholder="0.00">
              </div>
              <div class="form-group">
                  <label for="internToDate">Internships to Date:</label>
                  <input type="text" class="form-control" name="internToDate" id="internToDate" placeholder="0">
              </div>
      </div>
      <div class="modal-footer">
        <button type="submit" class="btn btn-success" name="save" value="save"> Add Student </button>
        <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
      </div>
        </form>
    </div>
  </div>
</div>
<!-- END ADD STUDENT MODAL -->

<?php

    include("../../config/db-connect.php");

    $errExist = false;

    if(isset($_POST['sID'])){
        $safeID = intval($_POST['sID']);
        if(!preg_match("/^.*(?=.{6,})(?=.*[0-9]).*$/", $safeID)){
            $errExist = true;
        }
    } else {
        $errExist = true;
    }

    if(isset($_POST['gYear'])){
        $safeYear = intval($_POST['gYear']);
        if(!preg_match("/^.*(?=.{4,})(?=.*[0-9]).*$/", $safeYear)){
            $errExist = true;
        }
    } else {
        $errExist = true;
    }

    if(isset($_POST['lName'])){
        $safeLastName = mysql_real_escape_string(filter_var($_POST['lName'], FILTER_SANITIZE_STRING));
    } else {
        $errExist = true;
    }

    if(isset($_POST['fName'])){
        $safeFirstName = mysql_real_escape_string(filter_var($_POST['fName'], FILTER_SANITIZE_STRING));
    } else {
        $errExist = true;
    }

    if(isset($_POST['servHrs'])){
        $safeHrs = floatval($_POST['servHrs']);
    } else {
        $errExist = true;
    }

    if(isset($_POST['interns'])){
        $safeInterns = intval($_POST['interns']);
    } else {
        $errExist = true;
    }

    // check if an error existed when checking inputs
    if(!$errExist){
        echo '<div class="alert alert-success" role="alert"><strong>Success!</strong></div>';
        echo $_POST['sID'].', '.$_POST['gYear'].', '.$_POST['lName'].', '.$_POST['fName'].', '.$_POST['servHrs'].', '.$_POST['interns'].'<br>';
        echo $safeID.', '.$safeYear.', '.$safeLastName.', '.$safeFirstName.', '.$safeHrs.', '.$safeInterns.'<br>';
        echo $errExist.'<br>';
    } else {
        echo '<div class="alert alert-danger" role="alert"><strong>Failure!</strong></div>';
        echo $_POST['sID'].', '.$_POST['gYear'].', '.$_POST['lName'].', '.$_POST['fName'].', '.$_POST['servHrs'].', '.$_POST['interns'].'<br>';
        echo $safeID.', '.$safeYear.', '.$safeLastName.', '.$safeFirstName.', '.$safeHrs.', '.$safeInterns.'<br>';
        echo $errExist.'<br>';
    }
?>

createRecord.php

<!-- ADD STUDENT Modal -->
<div class="modal fade" id="addStudentModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
        <h4 class="modal-title" id="myModalLabel">Add New Student</h4>
      </div>
      <div class="modal-body">
          <div id="additionResults"></div>
          <!-- EDIT form-->
          <form role="form" action="" method="" id="addStudentForm">
              <div class="form-group">
                  <label for="studentID">Student ID Number:</label>
                  <input type="text" class="form-control" name="studentID" id="studentID" placeholder="123456">
              </div>
              <div class="form-group">
                  <label for="lastName">Graduation Year:</label>
                  <input type="text" class="form-control" name="gradYear" id="gradYear" placeholder="0">
              </div>
              <div class="form-group">
                  <label for="lastName">Last Name:</label>
                  <input type="text" class="form-control" name="lastName" id="lastName" placeholder="Doe">
              </div>
              <div class="form-group">
                  <label for="firstName">First Name:</label>
                  <input type="text" class="form-control" name="firstName" id="firstName" placeholder="John">
              </div>
              <div class="form-group">
                  <label for="serHrsToDate">Service Hours to Date:</label>
                  <input type="text" class="form-control" name="serHrsToDate" id="serHrsToDate" placeholder="0.00">
              </div>
              <div class="form-group">
                  <label for="internToDate">Internships to Date:</label>
                  <input type="text" class="form-control" name="internToDate" id="internToDate" placeholder="0">
              </div>
      </div>
      <div class="modal-footer">
        <button type="submit" class="btn btn-success" name="save" value="save"> Add Student </button>
        <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
      </div>
        </form>
    </div>
  </div>
</div>
<!-- END ADD STUDENT MODAL -->

<?php

    include("../../config/db-connect.php");

    $errExist = false;

    if(isset($_POST['sID'])){
        $safeID = intval($_POST['sID']);
        if(!preg_match("/^.*(?=.{6,})(?=.*[0-9]).*$/", $safeID)){
            $errExist = true;
        }
    } else {
        $errExist = true;
    }

    if(isset($_POST['gYear'])){
        $safeYear = intval($_POST['gYear']);
        if(!preg_match("/^.*(?=.{4,})(?=.*[0-9]).*$/", $safeYear)){
            $errExist = true;
        }
    } else {
        $errExist = true;
    }

    if(isset($_POST['lName'])){
        $safeLastName = mysql_real_escape_string(filter_var($_POST['lName'], FILTER_SANITIZE_STRING));
    } else {
        $errExist = true;
    }

    if(isset($_POST['fName'])){
        $safeFirstName = mysql_real_escape_string(filter_var($_POST['fName'], FILTER_SANITIZE_STRING));
    } else {
        $errExist = true;
    }

    if(isset($_POST['servHrs'])){
        $safeHrs = floatval($_POST['servHrs']);
    } else {
        $errExist = true;
    }

    if(isset($_POST['interns'])){
        $safeInterns = intval($_POST['interns']);
    } else {
        $errExist = true;
    }

    // check if an error existed when checking inputs
    if(!$errExist){
        echo '<div class="alert alert-success" role="alert"><strong>Success!</strong></div>';
        echo $_POST['sID'].', '.$_POST['gYear'].', '.$_POST['lName'].', '.$_POST['fName'].', '.$_POST['servHrs'].', '.$_POST['interns'].'<br>';
        echo $safeID.', '.$safeYear.', '.$safeLastName.', '.$safeFirstName.', '.$safeHrs.', '.$safeInterns.'<br>';
        echo $errExist.'<br>';
    } else {
        echo '<div class="alert alert-danger" role="alert"><strong>Failure!</strong></div>';
        echo $_POST['sID'].', '.$_POST['gYear'].', '.$_POST['lName'].', '.$_POST['fName'].', '.$_POST['servHrs'].', '.$_POST['interns'].'<br>';
        echo $safeID.', '.$safeYear.', '.$safeLastName.', '.$safeFirstName.', '.$safeHrs.', '.$safeInterns.'<br>';
        echo $errExist.'<br>';
    }
?>

---

还值得注意的是，我还让它echoisset（变量名）为每个变量返回1（true）。是的，我确保我输入的测试值符合每个条件，因此，$errExist不应该设置为真。

哪些变量没有发布？我刚刚编辑了我的帖子，意识到这可能很重要。“gYear”和“lName”在createRecord.php中回显空白值（在模式中为gradYear和lastName），您可以检查开发控制台的网络选项卡以查看数据是否实际发送到服务器吗？是否可能在同一页面上有多个表单以及另一个包含

id=“gradYear”

等的表单。？如果是这样，请尝试在

this

上查找表单元素-例如

$（this）.find（“#gradYear”）.val（）

@RobM。谢谢你的回答$（这个）起作用了。