Question

我有这个联系表格。我希望在填写表单并单击提交按钮后，我的脚本会检查用户是否已登录。如果用户未登录，则会将其重定向到登录页面进行登录，之后，他会看到＆＃39 ;感谢填写表格＆＃39;。我不知道如何执行此操作，我的脚本在登录后将用户重定向回空联系表单，然后用户将再次填写字段。我该如何解决这个问题？

contact.php

<?php
session_start();
$location= urlencode($_SERVER['REQUEST_URI']);
if (isset($_SESSION['id']) == false){
    echo "You have to be <a href='login.php?location=$location'>logged in</a>";
}else{
//Insert into database 
//thanks for filling the form
}
?>
//Contact form fields

的login.php

<?php
if (login details is true) {
             $redirect = NULL;
             $redirect = $_GET['location'];
             header("Location:". $redirect);
}
?>

Answer 1

<?php  //Start the Session
session_start();
 require('connect.php');
//If the form is submitted or not. and If the form is submitted
if (isset($_POST['username']) and isset($_POST['password'])){
//Assigning posted values to variables.
$username = $_POST['username'];
$password = $_POST['password'];
//Checking the values are existing in the database or not
$query = "SELECT * FROM `user` WHERE username='$username' and password='$password'";

$result = mysql_query($query) or die(mysql_error());
$count = mysql_num_rows($result);
//If the posted values are equal to the database values, then session will be created for the user.
if ($count == 1){
$_SESSION['username'] = $username;
}else{
//If the login credentials doesn't match, he will be rediret with an error message.
header("Location:yourpage.php?msg=Invalid Login Credentials");
exit;
}
}
//if the user is logged in Greets the user with message
if (isset($_SESSION['username'])){
$username = $_SESSION['username'];
echo "Hai " . $username . "
";
echo "This is the Members Area
";
echo "<a href='logout.php'>Logout</a>";

}else{
header("Location:register.php");
exit;
}
?>

Answer 2

登录后将用户凭据转换为会话，例如他的联系人ID，联系人姓名，以便在整个项目中使用此进行此类检查..... 在联系表格中，如果用户登录到您的网站，您将获得会话详细信息，例如，如果他以$_SESSION['CONTACT_ID'];身份登录，则将他的联系人ID转换为会话然后，您可以检查顶部的此会话ID联系页面

 <?
    $redirect = "login.php";
    if($_SESSION['CONTACT_ID']=='')
    {
     header("Location:". $redirect);
    }
?>

如果用户未登录，则他将无法使用联系页面，并将被重定向到登录页面

Answer 3

首先，您必须保存用户放在每个字段中的内容，您可以将$ _POST传递给$ _SESSION;

\\

当用户登录时，您可以在字段（html表单）中检索这些数据$ _SESSION：

session_start();
$_SESSION['example'] = $_POST['dataFromForm'];
...

成功登录后，将页面重定向到后续页面时出错

3 个答案: