Passing multiple variables to another page in url

Question

I'm passing a variable to another page in a url using sessions like this but it seems that I can't concatenate another variable to the same url and retrieve it in the next page successfully

Page 1

session_start();

$event_id = $_SESSION['event_id'];

echo $event_id;



$url = "http://localhost/main.php?email=" . $email_address . $event_id;

Page 2

if (isset($_GET['event_id'])) {

$event_id = $_GET['event_id'];}

echo $event_id;

echo $event_id

shows an error

Undefined variable

on page 2 but if I use just the

event_id

in the

$url

like here

 $url = "http://localhost/main.php?event_id=" . $event_id;

That works fine, but I need to be able to use both variables in the url so that page 2 can retrieve get them.

Answer 1

Use the ampersand & to glue variables together:

$url = "http://localhost/main.php?email=$email_address&event_id=$event_id";
//                               ^ start of vars      ^next var

Passing multiple variables to another page in url

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