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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 |
|---|---|
| 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 | return; |
| 7 | } else if ( is_feed() ) { |
| 8 | do_feed(); |
| 9 | return; |
| 10 | } else if ( is_trackback() ) { |
| 11 | include(ABSPATH . 'wp-trackback.php'); |
| 12 | return; |