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I'm getting most of what's going on in the following code, with some help from http://www.php.net and http://codex.wordpress.org/Function_Reference/.

In its current situation, only one page on the site triggers the popup form if no cookie is set. Is that functionality specified within this code?

Here's the functions:

if (isset($_POST['confirm']) && isset($_POST['location'])) { 
    setcookie("Location", $_POST['location'], time()+3600);     
elseif (!isset($_COOKIE["Location"])) {
    setcookie("Location", "", 1);
elseif (isset($_POST['deny'])) {
    setcookie("Location", "", 1);

// Popup confirmation 
function show_popup($content) {
    global $post;
    $location = get_post_meta($post->ID, 'location', TRUE);
    if (strtolower($l) == strtolower($location) || strlen($location) == 0   
    || (isset($_COOKIE["Location"]) && strtolower($_COOKIE["Location"])  
    == strtolower($location))) {
        return $content;
    } else {
        <div id="popup">
    <form action="<?php echo $PHP_SELF ?>" method="post">
    <input type="hidden" name="location" value="<?php echo $location; ?>" />
    <input type="submit" name="confirm" value="Yes" />
    <input type="submit" name="deny" value="No" />
add_filter('the_content', 'show_popup');

// Adds content to the <head> tag
function add_meta_content() {
if(isset($_POST['deny'])) {
<meta http-equiv="refresh" content="0;url=<?php bloginfo ('wpurl') ?>">
if(isset($_POST['confirm'])) {
<meta http-equiv="refresh" content="0;url=<?php echo $PHP_SELF; ?>">

add_action('wp_head', 'add_meta_content');
share|improve this question
You should avoid using $PHP_SELF, in the above code you will get the same effect by not specifying an action at all, or by specifying an empty acction on your form element – Tom J Nowell May 6 at 15:00

make sure that the post as a customfield named 'location' and the page you are viewing is using the_content() or if you want this to work on categories and archives then add:

add_filter('the_excerpt', 'show_popup');

hope this helps

share|improve this answer
That's exactly it! Thanks, Bainternet. – dooley Feb 25 '11 at 22:33
glad i could help – Bainternet Feb 25 '11 at 22:48
@dooley don't forget you can mark this as the correct answer :) – Tom J Nowell May 6 at 15:01

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