Plugin that adds an ordinalize Twig filter.
Copy the ordinalize folder into craft/plugins/. In the Control Panel, go to Settings > Plugins and click the “Install” button next to “Ordinalize”.
The filter adds an ordinal suffix to integers, i.e 1st, 2nd, 3rd, 4th....
For example:
{% for item in items %}
This is the {{ loop.index|ordinalize }} item.
{% endfor %}
Outputs:
This is the 2nd item.
Thank you Cameron for your write up and example on how to create a Twig filter extension and Brad for your detailed answer to my question.