I am building an open search add-on for Firefox/IE and the image needs to be Base64 Encoded so how can I base 64 encode the favicon I have?
I am only familiar with PHP
As far as I remember there is an xml element for the image data. You can use this website to encode a file (use the upload field). Then just copy and paste the data to the XML element.
You could also use PHP to do this like so:
<?php $im = file_get_contents('filename.gif'); $imdata = base64_encode($im); ?>
Use Mozilla's guide for help on creating OpenSearch plugins. For example, the icon element is used like this:
<img width="16" height="16">data:image/x-icon;base64,imageData</>
imageData is your base64 data.
$encoded_data = base64_encode(file_get_contents('path-to-your-image.jpg'));