Using the WordPress functions.php file

Watch out! This tutorial is over 2 years old. Please keep this in mind as some code snippets provided may no longer work or need modification to work on current systems.

functions.php or the theme functions file is a template used by WordPress themes. It acts like a plugin and gets automatically loaded in both admin and front-end pages of a WordPress site. Usually this file is used to define functions, classes, actions and filters to be used by other templates in the theme. It can be used to add features and extend the functionality of both the theme, and the WordPress installation.

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Use Google’s Copy Of JQuery in WordPress

Watch out! This tutorial is over 2 years old. Please keep this in mind as some code snippets provided may no longer work or need modification to work on current systems.

Grabs jQuery from Google’s CDN which your visitors will hopefully have cached. This can then be called in your header with <?php wp_enqueue_script("jquery"); ?>

 

Custom Excerpt Length in WordPress

Watch out! This tutorial is over 2 years old. Please keep this in mind as some code snippets provided may no longer work or need modification to work on current systems.

Define how many words to return when using the_excerpt();.

 

Post Thumbnails in WordPress RSS Feed

Watch out! This tutorial is over 2 years old. Please keep this in mind as some code snippets provided may no longer work or need modification to work on current systems.

Include the post thumbnail in your RSS feed.

 

Customise WordPress Admin Footer

Watch out! This tutorial is over 2 years old. Please keep this in mind as some code snippets provided may no longer work or need modification to work on current systems.

Change the message that appears in the admin footer, why not give yourself a credit for the theme?