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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 |
|---|---|
| 27 | xmlns:atom="http://www.w3.org/2005/Atom" |
| 28 | xmlns:sy="http://purl.org/rss/1.0/modules/syndication/" |
| 29 | xmlns:slash="http://purl.org/rss/1.0/modules/slash/" |
| 30 | <?php |
| 31 | /** |
| 32 | * Fires at the end of the RSS root to add namespaces. |
| 33 | * |
| 34 | * @since 2.0.0 |
| 35 | */ |
| 36 | do_action( 'rss2_ns' ); |
| 37 | ?> |
| 38 | > |
| 39 | |
| 40 | <channel> |
| 41 | <title><?php wp_title_rss(); ?></title> |
| 42 | <atom:link href="<?php self_link(); ?>" rel="self" type="application/rss+xml" /> |
| 43 | <link><?php bloginfo_rss( 'url' ); ?></link> |
| 44 | <description><?php bloginfo_rss( 'description' ); ?></description> |
| 45 | <lastBuildDate><?php echo get_feed_build_date( 'r' ); ?></lastBuildDate> |