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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 |
---|---|
79 | echo apply_filters( 'rss_update_frequency', $frequency ); |
80 | ?> |
81 | </sy:updateFrequency> |
82 | <?php |
83 | /** |
84 | * Fires at the end of the RSS2 Feed Header. |
85 | * |
86 | * @since 2.0.0 |
87 | */ |
88 | do_action( 'rss2_head' ); |
89 |
|
90 | while ( have_posts() ) : |
91 | the_post(); |
92 | ?> |
93 | <item> |
94 | <title><?php the_title_rss(); ?></title> |
95 | <link><?php the_permalink_rss(); ?></link> |
96 | <?php if ( get_comments_number() || comments_open() ) : ?> |
97 | <comments><?php comments_link_feed(); ?></comments> |