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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 |
|---|---|
| 22 | do_action( 'rss2_ns' ); |
| 23 | ?> |
| 24 | |
| 25 | <?php |
| 26 | /** |
| 27 | * Fires at the end of the RSS root to add namespaces. |
| 28 | * |
| 29 | * @since 2.8.0 |
| 30 | */ |
| 31 | do_action( 'rss2_comments_ns' ); |
| 32 | ?> |
| 33 | > |
| 34 | <channel> |
| 35 | <title> |
| 36 | <?php |
| 37 | if ( is_singular() ) { |
| 38 | /* translators: Comments feed title. %s: Post title. */ |
| 39 | printf( ent2ncr( __( 'Comments on: %s' ) ), get_the_title_rss() ); |
| 40 | } elseif ( is_search() ) { |