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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.
This hook occurs 2 times in this file.
Line | Code |
---|---|
1 | <?php |
2 | if ( defined('WP_USE_THEMES') && constant('WP_USE_THEMES') ) { |
3 | do_action('template_redirect'); |
4 | if ( is_robots() ) { |
5 | do_action('do_robots'); |
6 | exit; |
7 | } else if ( is_feed() ) { |
8 | do_feed(); |
9 | exit; |
10 | } else if ( is_trackback() ) { |
11 | include(ABSPATH . '/wp-trackback.php'); |
12 | exit; |
13 | } else if ( is_404() && $template = get_404_template() ) { |
14 | include($template); |
Line | Code |
53 | } else if ( file_exists(TEMPLATEPATH . "/index.php") ) { |
54 | if ( is_attachment() ) |
55 | add_filter('the_content', 'prepend_attachment'); |
56 | include(TEMPLATEPATH . "/index.php"); |
57 | exit; |
58 | } |
59 | } else { |
60 | // Process feeds and trackbacks even if not using themes. |
61 | if ( is_robots() ) { |
62 | do_action('do_robots'); |
63 | exit; |
64 | } else if ( is_feed() ) { |
65 | do_feed(); |
66 | exit; |
67 | } else if ( is_trackback() ) { |
68 | include(ABSPATH . '/wp-trackback.php'); |
69 | exit; |
70 | } |
71 | } |