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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 | function the_ID() { |
| 13 | global $id; |
| 14 | echo $id; |
| 15 | } |
| 16 | |
| 17 | function the_title($before = '', $after = '', $echo = true) { |
| 18 | $title = get_the_title(); |
| 19 | if ( strlen($title) > 0 ) { |
| 20 | $title = apply_filters('the_title', $before . $title . $after, $before, $after); |
| 21 | if ($echo) |
| 22 | echo $title; |
| 23 | else |
| 24 | return $title; |
| 25 | } |
| 26 | } |
| 27 | |
| 28 | function get_the_title($id = 0) { |
| 29 | $post = &get_post($id); |