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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 |
|---|---|
| 1095 | /** |
| 1096 | * Get site index relational link. |
| 1097 | * |
| 1098 | * @since 2.8.0 |
| 1099 | * |
| 1100 | * @return string |
| 1101 | */ |
| 1102 | function get_index_rel_link() { |
| 1103 | $link = "<link rel='index' title='" . esc_attr(get_bloginfo('name')) . "' href='" . get_bloginfo('siteurl') . "' />\n"; |
| 1104 | return apply_filters( "index_rel_link", $link ); |
| 1105 | } |
| 1106 | |
| 1107 | /** |
| 1108 | * Display relational link for the site index. |
| 1109 | * |
| 1110 | * @since 2.8.0 |
| 1111 | */ |
| 1112 | function index_rel_link() { |
| 1113 | echo get_index_rel_link(); |