How to add a banner/image to the MediaWiki sidebar
To add a banner to the MediaWiki sidebar follow the next steps:
1. Find the file MonoBook.php in skins/MonoBook.php path (if you're using monobook)
2. Download the file.
3. Go to line 185 or file the line:
</div><!-- end of the left (by default at least) column -->
4. Add the next lines of code before the line you find above:
<!-- begin of banner1 -->
<div class='generated-sidebar portlet'>
<h5><?php $this->msg('sidebar-banner1-headingtext') ?></h5>
<div style="border: 1px solid #B0B0B0; background-color: #FFFFFF;">
<a href="<?php $this->msg('sidebar-banner1-url') ?>">
<img width="100%" title="<?php $this->msg('sidebar-banner1-alttext') ?>"
alt="<?php $this->msg('sidebar-banner1-alttext') ?>"
src="<?php $this->msg('sidebar-banner1-imgsrc') ?>" /></a>
</div></div>
<!-- end of banner1 -->
Should look as follows
?>
<!-- begin of banner1 -->
<div class='generated-sidebar portlet'>
<h5><?php $this->msg('sidebar-banner1-headingtext') ?></h5>
<div style="border: 1px solid #B0B0B0; background-color: #FFFFFF;">
<a href="<?php $this->msg('sidebar-banner1-url') ?>">
<img width="100%" title="<?php $this->msg('sidebar-banner1-alttext') ?>"
alt="<?php $this->msg('sidebar-banner1-alttext') ?>"
src="<?php $this->msg('sidebar-banner1-imgsrc') ?>" /></a>
</div></div>
<!-- end of banner1 -->
</div><!-- end of the left (by default at least) column -->
5.Create new articles / page named MediaWiki:sidebar-banner1-headingtext and write the banner heading. Example: Sponsor
6. Create new articles / page named MediaWiki:sidebar-banner1-url and write the The destination URL of this banner. Example: http://www.website.com/abc.html
7. Create new articles / page named MediaWiki:sidebar-banner1-alttext and write the alt="" parameter of an HTML <img> tag. Example: Best dog training
8. Create new articles / page named MediaWiki:sidebar-banner1-imgsrc and write the src="" parameter of an HTML <img> tag. The URL of the banner image. It may be the address of an image uploaded to your Wiki {{filepath:banner123.png}}, or the address of an external image. Example: http://www.website.com/banner123.gif
Do note that if you upgrade MediaWiki to the latest version it will overwrite the MonoBook.php file and you will have to re-edit the file for this to work.



