在PHP中从一页重定向到另一页

Question

我有一个登录页面，在成功登录其帐户后，用户将重定向到profile.php页面。 但是，如果他们只是简单地单击登录按钮而不输入值，或者如果他们输入了错误的值，我希望将它们重定向到index.html页面。 我尝试使用header("location: index.html"); 但没有奏效。 谁能告诉我该怎么做。

登录表单页面为：

<form role="form" action="login.php" method="post">
    <div class="form-group">
        <label for="exampleInputEmail1">Email</label>
        <input type="email" class="form-control" id="exampleInputEmail1" placeholder="Email" name="email">
    </div>

    <div class="form-group">
        <label for="exampleInputPassword1">Password</label>
        <input type="password" class="form-control" id="exampleInputPassword1" placeholder="Password" name="password">
    </div>
    <input name="submit" type="submit" value=" Login ">             
</form>

Login.php页面是

<?php
    session_start(); // Starting Session
    $error=''; // Variable To Store Error Message
    if (isset($_POST['submit'])) {
        if (empty($_POST['email']) || empty($_POST['password'])) {
            $error = "email or Password is invalid";
        }
        else
        {
            // Define $email and $password
            $email=$_POST['email'];
            $password=$_POST['password'];
            // To protect MySQL injection for Security purpose
            $email = stripslashes($email);
            $password = stripslashes($password);
            $email = mysql_real_escape_string($email);
            $password = mysql_real_escape_string($password);

            //Establishing Connection with Server by passing server_name, user_id and password as a parameter
            $connection = mysql_connect("abc.com", "abc", "abc");
            // Selecting Database
            $db = mysql_select_db("abc", $connection);
            // SQL query to fetch information of registerd users and finds user match.
            $query = mysql_query("select * from users where password='$password' AND email='$email'", $connection);
            $rows = mysql_num_rows($query);

            if ($rows == 1) {
                $_SESSION['login_user']=$email; // Initializing Session
                header("location: profile.php"); // Redirecting To Other Page
            } else {
                $error = "email or Password is invalid";
                header("location: index.html");
            }

            mysql_close($connection); // Closing Connection
        }
    }
?>

Answer 1

<?php
session_start(); // Starting Session

if (isset($_POST['submit'])) {
    try {
        if (empty($_POST['email']) || empty($_POST['password'])) {
            throw new Exception("email or Password is invalid");
        } else {
            // Define $email and $password
            $email      = $_POST['email'];
            $password   = $_POST['password'];
            // To protect MySQL injection for Security purpose
            $email      = stripslashes($email);
            $password   = stripslashes($password);
            $email      = mysql_real_escape_string($email);
            $password   = mysql_real_escape_string($password);
            //Establishing Connection with Server by passing server_name, user_id and password as a parameter
            $connection = mysql_connect("abc.com", "abc", "abc");
            // Selecting Database
            $db         = mysql_select_db("abc", $connection);
            // SQL query to fetch information of registerd users and finds user match.
            $query      = mysql_query("select * from users where password='$password' AND email='$email'", $connection);
            $rows       = mysql_num_rows($query);

            if ($rows != 1)
                throw new Exception("email or Password is invalid");

            $_SESSION['login_user'] = $email; // Initializing Session
            header("location: profile.php"); // Redirecting To Other Page
            mysql_close($connection); // Closing Connection
        }
    }
    catch (Exception $e) {
        $_SESSION['login_error'] = $e->getMessage();
        header("Location: index.html");
    }
}
?>

您可以通过$ _SESSION ['login_error']接收登录错误

Answer 2

如果您的两个字段均为空白，则表示您未将任何内容重定向到其他地方，因此请尝试在$error之后添加标头

if (empty($_POST['email']) || empty($_POST['password'])) {
  header("location: index.html");
}

另外，如果您重定向html页面，则无需使用$ error导致您无法在html页面上获取php变量。

Answer 3

// Change you conditional statement like ...
if (empty($_POST['email']) || empty($_POST['password'])) {
    header("location: index.html");
    exit(0);
}

Answer 4

我尝试使用您的代码并对其进行了一些修改，对我来说效果很好

session_start(); // Starting Session
$error=''; // Variable To Store Error Message
if (isset($_POST['submit'])) {
if (empty($_POST['email']) || empty($_POST['password'])) {
    header("location: index.html");
    exit(0);
} // ..... and so on