PHP表单转到空白页面

时间：2016-12-24 22:00:02

标签： php html forms


我试图让我的表单在输入字段上执行验证并显示有错误的位置。相反，页面刷新为空白页面。任何帮助将不胜感激。

注意：这些文件位于同一个文件（registration.php）

中

这是我的代码（PHP）：

//DB information
require("config.php");

//define error variables
$usernameValidation = $passwordValidation = $emailValidation = $fNameValidation = $lNameValidation = $usernameTaken = "";

if(isset($_POST['submitSignUp']))
{
    function validateSignUp()
    {
        $username = $_POST['userSignUp'];
        $password = $_POST['passSignUp'];
        $confPassword = $_POST['confPassSignUp'];
        $email = $_POST['emailSignUp'];
        $fName = $_POST['fName'];
        $lName = $_POST['lName'];

        $username = mysqli_real_escape_string($con, $_POST['userSignUp']);
        $password = mysqli_real_escape_string($con, $_POST['passSignUp']);
        $email = mysqli_real_escape_string($con, $_POST['emailSignUp']);
        $fName = mysqli_real_escape_string($con, $_POST['fName']);
        $lName = mysqli_real_escape_string($con, $_POST['lName']);

        $errors = array();
        //Validation on form
        if(empty($username) || strlen($username) > 20){
            $usernameValidation = "errorInput";
            array_push($errors, "errorUsername");
        }

        if(empty($fName) || strlen($fName) > 20 || !preg_match("/^[a-zA-Z ]*$/",$fName)){
            $fNameValidation = "errorInput";
            array_push($errors, "errorFName");
        }

        if(empty($lName) || strlen($lName) > 30 || !preg_match("/^[a-zA-Z ]*$/",$lName)){
            $lNameValidation = "errorInput";
            array_push($errors, "errorLName");
        }

        if(empty($password) || empty($confPassword) || strlen($password) > 20 || strlen($confPassword) > 20 || $password != $confPassword){
            $passwordValidation = "errorInput";
            array_push($errors, "errorPassword");
        }

        if(empty($email) || !filter_var($email, FILTER_VALIDATE_EMAIL)){
            $emailValidation = "errorInput";
            array_push($errors, "errorEmail");
        }

        //check if username is already taken
        $sql = mysqli_query($con, "SELECT * FROM users WHERE username = '$username'");

        $numRows = mysqli_num_rows($sql);

        if($numRows > 0)
        {
            //username already exists
            $usernameTaken =  "That username is already taken";
            array_push($errors, "errorUsernameTaken");
        }

        if(count($errors) > 0){
            return false;
        }
        else{
            //encrypt password
            $password = md5($password);
            //store info in DB
            $result = mysqli_query($con, "INSERT INTO users (username, password, email, firstName, lastName) VALUES ('$username', '$password', '$email', '$fName', '$lName')");
            //redirect to main page
            header('Location: index.php');
        }
    }
}
else if(isset($_POST['submitSignIn']))
{
    function validateSignIn()
    {
        $username = $_POST['userSignIn'];
        $password = $_POST['passSignIn'];

        $errors = array();

        if(empty($username)){
            $usernameValidation = "errorInput";
            array_push($errors, "error");
        }

        if(empty($password)){
            $passwordValidation = "errorInput";
            array_push($errors, "error");
        }

        if(count($errors) > 0){
            return false;
        }

        else{
            $username = mysqli_real_escape_string($con, $_POST['userSignIn']);
            $password = mysqli_real_escape_string($con, $_POST['passSignIn']);

            $password = md5($password);

            $sql = mysqli_query($con, "SELECT * FROM users WHERE username = '$username' AND 'password' = '$password'");

            $result = mysqli_num_rows($sql);

            if($result > 0)
            {
                //correct information, log them in
                header('Location: index.php');
            }
            else
            {
                //incorrect info
                return false;
            }
        }
    }   
}

这是我的代码（HTML）：

<body>
<div class="login-wrap">
<div class="login-html">
    <input id="tab-1" type="radio" name="tab" class="sign-in" checked><label for="tab-1" class="tab">Sign In</label>
    <input id="tab-2" type="radio" name="tab" class="sign-up"><label for="tab-2" class="tab">Sign Up</label>
    <div class="login-form">
        <div class="sign-in-htm">
            <form action="" method="POST">
                <div class="group">
                    <label for="user" class="label">Username</label>
                    <input id="userSignIn" name="userSignIn" type="text" class="input <?php if(isset($_POST['userSignIn'])){ echo ($usernameValidation);}?>" value="<?php if(isset($_POST['userSignIn'])){ echo htmlentities($username);}?>">
                </div>
                <div class="group">
                    <label for="pass" class="label">Password</label>
                    <input id="passSignIn" name="passSignIn" type="password" class="input <?php if(isset($_POST['passSignIn'])){ echo ($passwordValidation);}?>" data-type="password">
                </div>
                <div class="group">
                    <input id="check" type="checkbox" class="check" checked>
                    <label for="check"><span class="icon"></span> Keep me Signed in</label>
                </div>
                <div class="group">
                    <input type="submit" name="submitSignIn" class="button" value="Sign In" onsubmit="return validateSignIn()">
                </div>
                <div class="hr"></div>
                <div class="foot-lnk">
                    <a href="#forgot">Forgot Password?</a>
                </div>
            </form>
        </div>
        <div class="sign-up-htm">
            <form action="" method="POST">
                <div class="group">
                    <label for="fName" class="label">First Name</label>
                    <input id="fName" type="text" name ="fName" class="input <?php if(isset($_POST['fName'])){ echo ($fNameValidation);}?>" value="<?php if(isset($_POST['fName'])){ echo htmlentities($fName);}?>">
                </div>
                <div class="group">
                    <label for="lName" class="label">Last Name</label>
                    <input id="lName" type="text" name ="lName" class="input <?php if(isset($_POST['lName'])){ echo ($lNameValidation);}?>" value="<?php if(isset($_POST['lName'])){ echo htmlentities($lName);}?>">
                </div>
                <div class="group">
                    <label for="user" class="label">Username</label>
                    <input id="userSignUp" type="text" name ="userSignUp" class="input <?php if(isset($_POST['userSignUp'])){ echo ($usernameValidation);}?>" value="<?php if(isset($_POST['userSignUp'])){ echo htmlentities($username);}?>">
                    <span class="error"><?php echo $usernameTaken ?></span>
                </div>
                <div class="group">
                    <label for="pass" class="label">Password</label>
                    <input id="passSignUp" name="passSignUp" type="password" class="input <?php if(isset($_POST['passSignUp'])){ echo ($passwordValidation);}?>" data-type="password">
                </div>
                <div class="group">
                    <label for="pass" class="label">Confirm Password</label>
                    <input id="confPassSignUp" name="confPassSignUp" type="password" class="input <?php if(isset($_POST['passSignUp'])){ echo ($passwordValidation);}?>" data-type="password">
                </div>
                <div class="group">
                    <label for="pass" class="label">Email Address</label>
                    <input id="emailSignUp" name="emailSignUp" type="text" class="input <?php if(isset($_POST['emailSignUp'])){ echo ($emailValidation);}?>" value="<?php if(isset($_POST['emailSignUp'])){ echo htmlentities($email);}?>">
                </div>
                <div class="group">
                    <input type="submit" name="submitSignUp" class="button" value="Sign Up" onsubmit="return validateSignUp()">
                </div>
                <div class="hr"></div>
                <div class="foot-lnk">
                    <label for="tab-1">Already Member?</a>
                </div>
            </form>
        </div>
    </div>
</div>

提前谢谢!!

1 个答案:

答案 0 :(得分：0)

问题是，你没有调用任何一个函数

validateSignUp()或validateSignUp()

您的代码就像...... 

if(isset($_POST['submitSignUp']))
{
  function validateSignUp()
  {
    // ....
  }
} else if(isset($_POST['submitSignIn'])) {
  function validateSignIn()
  {
    // ....
  }
}

相反......它应该像...... 

if(isset($_POST['submitSignUp']))
{
  function validateSignUp()
  {
    // ....
  }

  validateSignUp();  //  <--- Notice
} else if(isset($_POST['submitSignIn'])) {
  function validateSignIn()
  {
    // ....
  }

  validateSignIn();  //  <--- Notice
}

坦率地说，如果你要在整个代码中只使用它们一次，我会要求你从那里删除这两个函数......函数是针对多个用例和login /注册只是单一案例......

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