I have created a session at my first page:
<?php
$youtubeID = get_sub_field('youtube_id');
$withlastSlash = 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
$withoutSlash = substr_replace($withlastSlash, "", -1);
$howtoURL = $withoutSlash . "?a=" . $youtubeID;
session_start();
$_SESSION['howtovidsurl'] = $howtoURL;
?>
I have then called the session variables in my second page
<?php
session_start();
echo $_SESSION['howtovidsurl'];
?>
But nothing is getting echoed out on the second page.