WordPress Filters are functions through which data flows or is changed. They're good for making on-the-fly changes to data (like adding acronyms to certain words). An exhaustive list of all filters available in WordPress 2.x along with annotations (where available) are provided.

Note: Filters are sitting between the database and the browser. Everything that flows from the database to the browser has to pass through a filter. By adding a filter you can change what the user sees without changing the content of your database. On the other hand, other filters can preprocess the inputs before their storage in your database.

The WordPress filters are displayed alphabetically below. Please click on appropriate (guess if required) alphabet to view all filters starting with that alphabet.

Note: Additionally there are few template filters which apply filters to Templates as described here.

You may also want to refer WordPress 2.x Hooks for Action - Comprehensive List for Plugin and Theme Developers

A B C D E F G H I K L M N O P Q R S T U V W X Y

No. Filter Name File Line No. Description
1 add_ping wp-includes/functions-post.php 807  
2 all_options wp-includes/functions.php 269  
3 attachment_icon wp-includes/template-functions-post.php 539  
4 attachment_innerHTML wp-includes/template-functions-post.php 552  
5 attachment_link wp-includes/template-functions-links.php 127  
6 attachment_max_dims wp-includes/template-functions-post.php 515  
7 author_email wp-includes/comment-functions.php 367  
8 author_feed_link wp-includes/feed-functions.php 109  
9 author_link wp-includes/template-functions-author.php 151  
10 author_rewrite_rules wp-includes/classes.php 1338  

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