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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 |
---|---|
48 | <sy:updatePeriod><?php echo apply_filters( 'rss_update_period', 'hourly' ); ?></sy:updatePeriod> |
49 | <?php /** This filter is documented in wp-includes/feed-rss2.php */ ?> |
50 | <sy:updateFrequency><?php echo apply_filters( 'rss_update_frequency', '1' ); ?></sy:updateFrequency> |
51 | <?php |
52 | /** |
53 | * Fires at the end of the RSS2 comment feed header. |
54 | * |
55 | * @since 2.3.0 |
56 | */ |
57 | do_action( 'commentsrss2_head' ); |
58 |
|
59 | if ( have_comments() ) : while ( have_comments() ) : the_comment(); |
60 | $comment_post = $GLOBALS['post'] = get_post( $comment->comment_post_ID ); |
61 | ?> |
62 | <item> |
63 | <title><?php |
64 | if ( !is_singular() ) { |
65 | $title = get_the_title($comment_post->ID); |
66 | /** This filter is documented in wp-includes/feed.php */ |