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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 |
|---|---|
| 1152 | /** |
| 1153 | * Get site index relational link. |
| 1154 | * |
| 1155 | * @since 2.8.0 |
| 1156 | * |
| 1157 | * @return string |
| 1158 | */ |
| 1159 | function get_index_rel_link() { |
| 1160 | $link = "<link rel='index' title='" . esc_attr(get_bloginfo('name')) . "' href='" . get_bloginfo('siteurl') . "' />\n"; |
| 1161 | return apply_filters( "index_rel_link", $link ); |
| 1162 | } |
| 1163 | |
| 1164 | /** |
| 1165 | * Display relational link for the site index. |
| 1166 | * |
| 1167 | * @since 2.8.0 |
| 1168 | */ |
| 1169 | function index_rel_link() { |
| 1170 | echo get_index_rel_link(); |