Passing Parameter from URL string in Header() redirect to another page in PHP

Question

I want to pass the URL string data to dashboard.php from login.php here I have just a login auth whereas the data present in the URL is been carried from homepage.php form to login via URL string, I want to carry forward this string to dashboard

The code which gets redirected from dashboard.php for login session for login:

<?php
if(!$_SESSION["UserName"])
{
    //Do not show protected data, redirect to login...
     $FullName = $_REQUEST["name_"]; 
     $Subject = $_REQUEST["subject_"];
     $Phone = $_REQUEST["phone_"];
     $Email = $_REQUEST["email_"];
     $Message = $_REQUEST["message_"];
    header("Location: login.php?name_=$FullName&subject_=$Subject&phone_=$Phone&email_=$Email&message_=$Message");

}

?>

URL String shown in login.php after redirect:

http://localhost/youngants/login.php?name_=Sharayu%20Bhave&subject_=hello&phone_=9876543210&email_=bhave.sharayu@gmail.com&message_=hh

After the user logs in and redirects to dashbord.php I get a blank URL string and data is not displayed, see below :-

http://localhost/youngants/dashboard.php?name_=&subject_=&phone_=&email_=&message_=

My login code where I pass the same URL again via header(), see below :-

if(isset($_POST['login']))  
                                    {  
                                        $username=$_POST['Username'];  
                                        $user_pass=$_POST['password'];  
                                        $encrypt_pass = md5($user_pass);


                                        $check_user="select * from tbl_logindetails WHERE UserName='".$username."' AND Password='".$encrypt_pass."'";
                                        $run=mysqli_query($connection,$check_user); 



    if(mysqli_num_rows($run))  
                                            {  
                                                //echo "<script>window.open('www.google.com','_self')</script>"; 
                                                header("Location: dashboard.php?name_=$FullName&subject_=$Subject&phone_=$Phone&email_=$Email&message_=$Message");                                  

                                                $_SESSION['UserName']= $username; //here session is used and value of $user_email store in $_SESSION.  


                                            }  
                                            else 
                                            {  

                                              echo "<script>alert( 'Error in Registering Useer, Please try again later' )</script>";  
                                            }  
                                        }  

My html form from which i take data :-

 <form class="form ajax-contact-form" method="" action="dashboard.php">
                            <div class="alert alert-success hidden" id="contact-success">
                                <span class="glyphicon glyphicon-ok "></span> &nbsp;
                                <strong>Success!</strong> Thank you for your message.
                            </div>
                            <div class="alert alert-danger hidden" id="contact-error">
                                <span class="glyphicon glyphicon-remove "></span> &nbsp;
                                <strong>Error!</strong> Oops, something went wrong.
                            </div>
                            <div class="row col-p10">
                                <div class="col-sm-6">
                                    <label class="mb10">
                                        <input type="text" name="name_" id="name_" required class="form-control" placeholder=" Full Name * ">


                                    </label>
                                </div>
                                <div class="col-sm-6">
                                    <label class="mb10">
                                        <input type="text" name="subject_" id="subject_" required class="form-control" placeholder=" Subject *">
                                    </label>
                                </div>
                            </div>
                            <div class="row col-p10">
                                <div class="col-sm-6">
                                    <label class="mb10">
                                        <input type="text" name="phone_" id="phone_" class="form-control" placeholder=" Phone">
                                    </label>
                                </div>
                                <div class="col-sm-6">
                                    <label class="mb10">
                                        <input type="email" name="email_" id="email_" required class="form-control" placeholder=" Email Address *">
                                    </label>
                                </div>
                            </div>
                            <label>
                                <textarea name="message_" id="message_" cols="30" rows="10" required class="form-control" placeholder=" Message *"></textarea>
                            </label>
                            <div class="mb40"></div>
                            <div class="clearfix">
                            <!-- Enter your google site key here for captcha -->
                               <div class="pull-right xs-pull-left xs-box">



                                </div>  
                                <div class="pull-left">
                                    <button type="submit" class="btn btn-icon btn-e" value="submit" name="submit"><i class="icon icon_mail_alt"></i> Sumbit</button>



                                </div>
                            </div>
                        </form>

I want is to take the above URL from login.php back to dashboard.php and display this data there on dashboard.php. Note, I have only the user id pass auth on login where the URL link carries data from homepage.php.

Answer 1

on login, when redirecting to dashboard your URL is

 header("Location: dashboard.php?name_=$FullName&subject_=$Subject&phone_=$Phone&email_=$Email&message_=$Message"); 

those variables dont exist. you need to use $_GET['name_'] etc, the names used in the url