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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 |
|---|---|
| 821 | if ( 'category' == $taxonomy ) { |
| 822 | /** |
| 823 | * Filters the category feed link. |
| 824 | * |
| 825 | * @since 1.5.1 |
| 826 | * |
| 827 | * @param string $link The category feed link. |
| 828 | * @param string $feed Feed type. |
| 829 | */ |
| 830 | $link = apply_filters( 'category_feed_link', $link, $feed ); |
| 831 | } elseif ( 'post_tag' == $taxonomy ) { |
| 832 | /** |
| 833 | * Filters the post tag feed link. |
| 834 | * |
| 835 | * @since 2.3.0 |
| 836 | * |
| 837 | * @param string $link The tag feed link. |
| 838 | * @param string $feed Feed type. |
| 839 | */ |