Generating a random number to be used as same in subsequent pages

Question

Currently I am generating a random number for my advertising landing page to make up for MB being used and it's working nicely.

But I am wondering if it's possible for me to somehow get the same number that is being generated each time with <?php echo(rand(10,20)); ?> so I can use it in multiple locations.

`session_start(); $_SESSION['var'] = rand(10,20); $var = $_SESSION['var'];` that ought to work. — Funk Forty Niner, Dec 17 '15 at 18:29
You're most welcome. I wrote that from the top of my head. ;-) — Funk Forty Niner, Dec 17 '15 at 18:30
you can delete the question if you want to. or, if you really want me to post an answer, I will. I'm not in this for the points. The choice is yours ;-) — Funk Forty Niner, Dec 17 '15 at 18:33
I decided to post an answer below with an example for you and for future visitors to the question. — Funk Forty Niner, Dec 17 '15 at 18:38

score 3 · Accepted Answer · edited May 23 '17 at 10:28

You can achieve this using sessions.

First you need to start a session, assign a session array to the random function, then a variable from that session array.

<?php 
session_start(); 
$_SESSION['var'] = rand(10,20); 

$var = $_SESSION['var'];

Then you can use that in subsequent pages, just as long as you start the session in those pages also.

Reference:

http://php.net/manual/en/session.examples.basic.php

Example:

File 1

<?php 
session_start(); 
$_SESSION['var'] = rand(10,20); 

echo $var = $_SESSION['var'];

File 2

<?php 
session_start(); 

echo $var = $_SESSION['var'];

Sidenote:

Make sure there isn't anything above that, as it may trigger a headers sent notice.

If you do get one, visit the following page on Stack:

How to fix "Headers already sent" error in PHP

Generating a random number to be used as same in subsequent pages

1 Answers1