Passing Keyword Data Thru php Redirect Links?

[KirstyM]

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Hello,

I've been curious about this one for a while. I used to used a php echo on my PPC landing pages to pass keyword data from the URL into the clickreference field of an affiliate link.

However, now that a lot of people are using php links to mask their affiliate urls I was wondering how you could still record keyword data by passing variables through your masked urls? I'm assuming this is relatively straightforward if you've a knowledge of php!

[futureweb]

// Session to store your keyword
session_start();
session_register('keyword');

if(preg_match('/google|yahoo|msn|altavista/i', $parts['host']) && !empty($parts['query'])) {
}
$referer_query = '';


$referer_params = array('q','query','p','Q','Query','P');

if(!empty($_SERVER['HTTP_REFERER'])) {
   $parts = parse_url($_SERVER['HTTP_REFERER']);
   if(!empty($parts['query'])) {
       parse_str($parts['query'], $query_params);
       foreach($referer_params as $key) {
          if(isset($query_params[$key])) {
              $referer_query = $query_params[$key];
              break;
          }
       }
   }
}


if(!empty($referer_query)) {
$_SESSION['keyword'] = urlencode($referer_query);
}else{
// theres no keyword Bookmark?
$_SESSION['keyword'] = 'NULL';
} 

You can then carry this over to your links page and call the session var

// Links page

// Don't forget this
session_start();

// link example
 $link = mysql_query("select link from tablename where id = '".$_GET['id']."'");
    $l=mysql_fetch_assoc($link);
header('Location: '.$link.'&epi='.$_SESSION['keyword']);
exit();