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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 57 | * |
| 58 | * @package WordPress |
| 59 | * @subpackage Feed |
| 60 | * @since 2.5 |
| 61 | * @uses apply_filters() Calls 'default_feed' hook on the default feed string. |
| 62 | * |
| 63 | * @return string Default feed, or for example 'rss2', 'atom', etc. |
| 64 | */ |
| 65 | function get_default_feed() { |
| 66 | $default_feed = apply_filters('default_feed', 'rss2'); |
| 67 | return 'rss' == $default_feed ? 'rss2' : $default_feed; |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Retrieve the blog title for the feed title. |
| 72 | * |
| 73 | * @package WordPress |
| 74 | * @subpackage Feed |
| 75 | * @since 2.2.0 |