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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 |
|---|---|
| 11 | ?> |
| 12 | <?php echo '<?xml version="1.0" encoding="'.get_option('blog_charset').'"?'.'>'; ?> |
| 13 | <rdf:RDF |
| 14 | xmlns="http://purl.org/rss/1.0/" |
| 15 | xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" |
| 16 | xmlns:dc="http://purl.org/dc/elements/1.1/" |
| 17 | xmlns:sy="http://purl.org/rss/1.0/modules/syndication/" |
| 18 | xmlns:admin="http://webns.net/mvcb/" |
| 19 | xmlns:content="http://purl.org/rss/1.0/modules/content/" |
| 20 | <?php do_action('rdf_ns'); ?> |
| 21 | > |
| 22 | <channel rdf:about="<?php bloginfo_rss("url") ?>"> |
| 23 | <title><?php bloginfo_rss('name'); wp_title_rss(); ?></title> |
| 24 | <link><?php bloginfo_rss('url') ?></link> |
| 25 | <description><?php bloginfo_rss('description') ?></description> |
| 26 | <dc:date><?php echo mysql2date('Y-m-d\TH:i:s\Z', get_lastpostmodified('GMT'), false); ?></dc:date> |
| 27 | <?php the_generator( 'rdf' ); ?> |
| 28 | <sy:updatePeriod>hourly</sy:updatePeriod> |
| 29 | <sy:updateFrequency>1</sy:updateFrequency> |