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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 |
---|---|
6 | <?php echo '<?xml version="1.0" encoding="'.get_option('blog_charset').'"?'.'>'; ?> |
7 | <!-- generator="wordpress/<?php echo $wp_version ?>" --> |
8 | <rdf:RDF |
9 | xmlns="http://purl.org/rss/1.0/" |
10 | xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" |
11 | xmlns:dc="http://purl.org/dc/elements/1.1/" |
12 | xmlns:sy="http://purl.org/rss/1.0/modules/syndication/" |
13 | xmlns:admin="http://webns.net/mvcb/" |
14 | xmlns:content="http://purl.org/rss/1.0/modules/content/" |
15 | <?php do_action('rdf_ns'); ?> |
16 | > |
17 | <channel rdf:about="<?php bloginfo_rss("url") ?>"> |
18 | <title><?php bloginfo_rss('name'); wp_title_rss(); ?></title> |
19 | <link><?php bloginfo_rss('url') ?></link> |
20 | <description><?php bloginfo_rss('description') ?></description> |
21 | <dc:date><?php echo mysql2date('Y-m-d\TH:i:s\Z', get_lastpostmodified('GMT'), false); ?></dc:date> |
22 | <admin:generatorAgent rdf:resource="http://wordpress.org/?v=<?php echo $wp_version ?>"/> |
23 | <sy:updatePeriod>hourly</sy:updatePeriod> |
24 | <sy:updateFrequency>1</sy:updateFrequency> |