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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 |
|---|---|
| 103 | */ |
| 104 | function get_the_title( $id = 0 ) { |
| 105 | $post = &get_post($id); |
| 106 | |
| 107 | $title = isset($post->post_title) ? $post->post_title : ''; |
| 108 | $id = isset($post->ID) ? $post->ID : (int) $id; |
| 109 | |
| 110 | if ( !is_admin() ) { |
| 111 | if ( !empty($post->post_password) ) { |
| 112 | $protected_title_format = apply_filters('protected_title_format', __('Protected: %s')); |
| 113 | $title = sprintf($protected_title_format, $title); |
| 114 | } else if ( isset($post->post_status) && 'private' == $post->post_status ) { |
| 115 | $private_title_format = apply_filters('private_title_format', __('Private: %s')); |
| 116 | $title = sprintf($private_title_format, $title); |
| 117 | } |
| 118 | } |
| 119 | return apply_filters( 'the_title', $title, $id ); |
| 120 | } |
| 121 | |