Question

您好我有一个奇怪的问题。我有一个PHP验证表单，但即使表单字段为空，表单仍然提交。以下是我的代码......你能否告诉我这里发生了什么。

同一页面上还有2个表格。两者都使用$_SERVER['PHP_SELF']动作。

工作流程是用户使用第一个表单旋转奖品轮（验证在此表单上正常工作），然后在成功提交后，微调器出现。

如果微调器落在获胜段上，则第二个表单出现（哪个将提交为空）如果我在第二个表单上单击提交，则第一个表单再次出现并忽略第二个表单验证。我确定可以安全地假设这是因为页面令人耳目一新。有办法解决这个问题吗？

$nameErr = $lNameErr = $pCodeErr = $successMessage = $errorMessage = "";
$name = $lName = $pCode = "";

$errors = 0;
$regex = '^[a-zA-Z0-9]{3}( )?[a-zA-Z0-9]{3}$^';

if ($_SERVER["REQUEST_METHOD"] == "POST") {

    if (empty($_POST["name"])) {
        $nameErr = "First Name is required";
        $errors++;
    }else {
        $name = test_input($_POST["name"]);
    }

    if (empty($_POST["lName"])) {
        $lNameErr = "Last Name is required";
        $errors++;
    }else {
        $lName = test_input($_POST["lName"]);
    }

    if (empty($_POST["pCode"])) {
        $pCodeErr = "Postal Code is required";
        $errors++;
    }else {
        $pCode = test_input($_POST["pCode"]);

        // check if e-mail address is well-formed
        if (!preg_match($regex, $_POST["pCode"])) {
            $pCodeErr = "Invalid Postal Code format";
            $errors++;
        }
    }

    if($errors == 0){
        $duplicate = $conn->prepare( "SELECT `Pcode` FROM `winners` WHERE `Pcode` = ?" );
        $query->bindValue( 1, $email );
        $query->execute();
        if( $duplicate->rowCount() > 0 ) {
            $errorMessage = "Sorry this user is already in our database!";
        } else {
            $successMessage = "Form Submission Successful!";
            $sql = "INSERT INTO winners (Fname, Lname, Pcode) VALUES (:fName, :lName, :pCode)";
            $stmt = $conn->prepare($sql);
            // $stmt->bindParam(':email', $email, PDO::PARAM_STR);
            $stmt->bindParam(':fName', $name, PDO::PARAM_STR);
            $stmt->bindParam(':lName', $lName, PDO::PARAM_STR);
            $stmt->bindParam(':pCode', $pCode, PDO::PARAM_STR);
            $stmt->execute();
        }
    }
}

这是我的表格

<form id="winner-form" class="spin-form" method = "post" action = "<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">

    <p>To claim your prize please fill in the form below.</p>
    <div class="form-group">
        <label>Name:</label>
        <input class="form-control" placeholder="Please enter your First Name"  value="<?php echo $name;?>" type = "text" name = "name">
        <span class = "error">* <?php echo $nameErr;?></span>
    </div>

    <div class="form-group">
        <label>Last Name:</label>
        <input class="form-control" placeholder="Please enter your Last Name"  value="<?php echo $lName;?>" type = "text" name = "lName">
        <span class="error">* <?php echo $lNameErr;?></span>
    </div>

    <div class="form-group">
        <label>Postal Code:</label>
        <input class="form-control" placeholder="Please enter your Postal Code"  value="<?php echo $pCode;?>" type = "text" name = "pCode">
        <span class="error">* <?php echo $pCodeErr;?></span>
    </div>

    <td>
        <input class="btn btn-lg btn-success" type="submit" name="sub" value="Submit">
    </td>

    <?php if($successMessage  != "") { ?>
        <span class ='alert alert-success'><?php echo $successMessage; ?></span>
    <?php } ?>

    <?php if($errorMessage  != "") { ?>
        <span class ='alert alert-danger'><?php echo $errorMessage; ?></span>
    <?php  } ?>

</form>

Answer 1

抱歉，我无法发表评论，因为我的声誉较低，如果您将SQL Null检查设置为NO，则可以阻止用户提交空值。或者在Php的结尾。

if ($_SERVER["REQUEST_METHOD"] == "POST") {
  if (isset($_POST["name"]) == "") {
      $nameErr = "First Name is required";
      $errors++;
  }
}

或

if ($_SERVER["REQUEST_METHOD"] == "POST") {
  if ($_POST["name"]) == Null) {
      $nameErr = "First Name is required";
      $errors++;
  }
}

但使用Javascript或Jquery编写表单验证函数通常是最好的。你喜欢哪个。我希望我的假设评论很有帮助。：）

当表单为空并且验证到位时，PHP表单提交

1 个答案: