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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 |
|---|---|
| 1245 | /** |
| 1246 | * Get site index relational link. |
| 1247 | * |
| 1248 | * @since 2.8.0 |
| 1249 | * |
| 1250 | * @return string |
| 1251 | */ |
| 1252 | function get_index_rel_link() { |
| 1253 | $link = "<link rel='index' title='" . esc_attr( get_bloginfo( 'name', 'display' ) ) . "' href='" . esc_url( user_trailingslashit( get_bloginfo( 'url', 'display' ) ) ) . "' />\n"; |
| 1254 | return apply_filters( "index_rel_link", $link ); |
| 1255 | } |
| 1256 | |
| 1257 | /** |
| 1258 | * Display relational link for the site index. |
| 1259 | * |
| 1260 | * @since 2.8.0 |
| 1261 | */ |
| 1262 | function index_rel_link() { |
| 1263 | echo get_index_rel_link(); |