How to store a value in a session? - php

Question

I am displaying the user names as links on a php page like this which on clicking navigates on particular user home page:
$msql=$db->prepare("SELECT * from users where id=? order by id desc");
$msql->bind_param("i",$user_id);
$msql->execute();
$msql = $msql->get_result();
$msql = $msql->num_rows;
while($usercount=$msql->fetch_assoc())
{
$Email = $usercount['email'];
$FirstName = $usercount['first_name'];
$LastName = $usercount['last_name'];
?>
<strong><?php echo $FirstName.' '.$LastName;?></strong>
<?php
}
?>
And for the navigation to the user home page on clicking the link, I am using like this :
<?php
if(isset($_GET['navigate']) && $_GET['navigate'] == "true"){
$_SESSION['email'] = $Email;
header('location: nextpage.php');
}
?>
So my page looks like this as link
user1
user2
user3
.
.
.
usern
My issue is whenever I click on any of the links it always stores the first email in the session variable.
So, if I output the SESSION in nextpage.php
echo $_SESSION['email'];
it always echoes the first link email.
My guess for this because of the while loop I am using it always picks up the first link data and stays with it, but my question is how do i get the data for others as well. I want to navigate to that user page for which the link is clicked and that can only be done if I get the correct email on clicking the link.

Answer 1

As you said id is not primary key, and i assume that your same id will contain different emails, you have to do below changes:-
<?php
$msql=$db->prepare("SELECT * from users where id=? order by id desc");
$msql->bind_param("i",$user_id);
$result = $msql->execute(); // assign to a variable
//$msql = $msql->get_result(); //you are over-writing to one variable which is not correct
//$msql = $msql->num_rows; //you are over-writing to one variable which is not correct
while($usercount=$result->fetch_assoc()){
$Email = $usercount['email'];
$FirstName = $usercount['first_name'];
$LastName = $usercount['last_name'];
?>
<strong><?php echo $FirstName.' '.$LastName;?></strong> <!-- send mail id to the url too otherwise how's you will get the email id to save it into SESSION-->
<?php } ?>
AND
<?php
if(isset($_GET['navigate']) && $_GET['navigate'] == "true"){
$_SESSION['email'][] = $_GET['email']; // assign each mail to SESSION ARRAY not SESSION variable
header('location: nextpage.php');
}
?>
AND
echo "<pre/>";print_r($_SESSION['email']); //to see all emails.
Note:- You have to write session_start(); on top of your php page just after <?php if you want to work with SESSION on that page.