Jacken’s Blog

I have just added adds from Chitika. They can do targeted ads just like Google AdSense, but in the Google AdSense contract you are forbidden to use that with another ad company if they use targeted ads. But there’s a way of manually add the stuff that’s supposed to show in the ads from Chitika. But that involves editing the index.php and then add that search word in the javascript variable called ch_query. But wouldn’t it be great if you could use the Custom Fields that’s already in WordPress? Well you can. And here’s how I did it. When writing your blog posting, just add a tag called “ad” in the Custom fields, and then put the search word you want, for example “ipod”. I’ve put the code so that WordPress uses the the codes when displaying a single post. So if you write a posting about photography, you can add an “ad” tag with “canon eos” or similar, and be certain only relevant adds be shown. If there’s no custom field with an “ad” entry, it just displays a Google AdSense ad instead.

The code ain’t pretty, but it does the job.

You need to open your index.php found in /wp-content/themes/yourtheme and look for:

if ($single && (empty($post->password) || 

$HTTP_COOKIE_VARS['wp-postpass_'.$cookiehash] == $post->post_password)) {

And add the following code (after editing the outlined parts of the code) after that. Then the targeted ad will only show up when someone clicks on a specific posting.

<?php

$adkey = get_post_meta($post->ID, "ad", FALSE);

if (!$adkey) {

    /* No ad keyword, so display Google ads. */

    

    /* ADD GOOGLE OR OTHER CONTENT HERE IF NO DIRECT AD TAG */

    ?>



<?php

    }

else {



    /* Now lets add the Chitika code here. */

    /* All Custom Fields with tag 'ad' will be used */

    ?>

    

    <script type="text/javascript"><!--

    ch_client = "Your client id here";

    ch_width = 468;

    ch_height = 60;

    ch_nosearch = 1;  // Remove search tab to comply with Google Ads

    <?php

    /* Now take all custom fields*/

    srand(time());

    $adrnd = rand(0,count($adkey) - 1);

    print("var ch_query = '$adkey[$adrnd]';");

    ?>

    //--></script>

    <script  src="http://scripts.chitika.net/eminimalls/mm.js" type="text/javascript">

    </script>



    <?php

    }

After adding and modifying the code to suit your needs, you need to go and add some tags. Go to the admin pages of WordPress and edit postings. You can have several tags per posting.

Here I have added three different ads. The ads will be randomly selected automatically.

Now try to load the posting in question.

You should now have a more flexible ad system, and it’s easy to update as well.