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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 |
|---|---|
| 109 | if ( ! empty( $post->post_password ) ) { |
| 110 | $protected_title_format = apply_filters( 'protected_title_format', __( 'Protected: %s' ) ); |
| 111 | $title = sprintf( $protected_title_format, $title ); |
| 112 | } else if ( isset( $post->post_status ) && 'private' == $post->post_status ) { |
| 113 | $private_title_format = apply_filters( 'private_title_format', __( 'Private: %s' ) ); |
| 114 | $title = sprintf( $private_title_format, $title ); |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | return apply_filters( 'the_title', $title, $id ); |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * Display the Post Global Unique Identifier (guid). |
| 123 | * |
| 124 | * The guid will appear to be a link, but should not be used as an link to the |
| 125 | * post. The reason you should not use it as a link, is because of moving the |
| 126 | * blog across domains. |
| 127 | * |
| Line | Code |
| 1053 | } elseif ( $page->ID == get_option('page_for_posts') ) { |
| 1054 | $css_class[] = 'current_page_parent'; |
| 1055 | } |
| 1056 | |
| 1057 | $css_class = implode( ' ', apply_filters( 'page_css_class', $css_class, $page, $depth, $args, $current_page ) ); |
| 1058 | |
| 1059 | if ( '' === $page->post_title ) |
| 1060 | $page->post_title = sprintf( __( '#%d (no title)' ), $page->ID ); |
| 1061 | |
| 1062 | $output .= $indent . '<li class="' . $css_class . '"><a href="' . get_permalink($page->ID) . '">' . $link_before . apply_filters( 'the_title', $page->post_title, $page->ID ) . $link_after . '</a>'; |
| 1063 | |
| 1064 | if ( !empty($show_date) ) { |
| 1065 | if ( 'modified' == $show_date ) |
| 1066 | $time = $page->post_modified; |
| 1067 | else |
| 1068 | $time = $page->post_date; |
| 1069 | |
| 1070 | $output .= " " . mysql2date($date_format, $time); |
| 1071 | } |