Google Adsense in MediaWiki 1.14.0

Update (2011-07-17): the easiest way, rather than modifying the source code, is to use the PCR GUI Inserts MediaWiki extension.

Here is how we set up Google Adsense (and more generally, a customized ad area which will show Google Adsense on pages where it is allowed, and another ad on other pages) to show in MediaWiki 1.14.0:

1. Force the monobook skin for everyone (unless you want to edit every skin…) by putting this setting in LocalSettings.php:
$wgAllowUserSkin = false;
NB: this setting is new to MediaWiki 1.14! If you have an older version, either upgrade or see our previous tutorial

2. In your skins folder, create a file within a subfolder (for instance “0custom/ad_vertical.php”) with the following content (edit with your own Google Adsense code as well as your own alternative ad; also, make sure to choose a VERTICAL ad, since we are adding code in the left sidebar!):
<?php
if(!strstr($_SERVER['REQUEST_URI'], "Special:") &&
!strstr($_SERVER['REQUEST_URI'], "action=submit") &&
!strstr($_SERVER['REQUEST_URI'], "action=edit") &&
!strstr($_SERVER['REQUEST_URI'], "Template:"))
echo '<div id="v-g-ads" class="portlet">
<h5>Google ads</h5>
<div class="pBody">
<script type="text/javascript"><!--
google_ad_client = "pub-9471398824076666";
/* 120x240 for Wiki4Games sidebar */
google_ad_slot = "3512091103";
google_ad_width = 120;
google_ad_height = 240;
//-->
</script>
<script type="text/javascript"
src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
</div>
</div>';
else echo '<div id="v-g-ads" class="portlet">
<h5>Ads</h5>
<div class="pBody">
<a href="http://proxify.com/r/?s=1320"><img src="http://proxify.com/i/info-110x110.gif" width="110" height="110" alt="disable proxy" border="0"></a>
</div>
</div>';
?>

3. Edit MonoBook.php as follow:
Replace:
function languageBox() {
if( $this->data['language_urls'] ) {
?>
<div id="p-lang" class="portlet">
<h5><?php $this->msg('otherlanguages') ?></h5>
<div class="pBody">
<ul>
<?php foreach($this->data['language_urls'] as $langlink) { ?>
<li class="<?php echo htmlspecialchars($langlink['class'])?>"><?php
?><a href="<?php echo htmlspecialchars($langlink['href']) ?>"><?php echo $langlink['text'] ?></a></li>
<?php } ?>
</ul>
</div>
</div>
<?php
}
}
With:
function languageBox() {
if( $this->data['language_urls'] ) {
?>
<div id="p-lang" class="portlet">
<h5><?php $this->msg('otherlanguages') ?></h5>
<div class="pBody">
<ul>
<?php foreach($this->data['language_urls'] as $langlink) { ?>
<li class="<?php echo htmlspecialchars($langlink['class'])?>"><?php
?><a href="<?php echo htmlspecialchars($langlink['href']) ?>"><?php echo $langlink['text'] ?></a></li>
<?php } ?>
</ul>
</div>
</div>
<?php
}
include("0custom/ad_vertical.php");
}
NB: In fact we’re just adding the include at the end of the function.

4. Upload the stuff (don’t forget there are 2 files to upload, not just one), and you’re done 🙂