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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 |
|---|---|
| 1236 | |
| 1237 | $title = str_replace( '%title', $post_title, $title ); |
| 1238 | $title = str_replace( '%date', $date, $title ); |
| 1239 | |
| 1240 | $link = $previous ? "<link rel='prev' title='" : "<link rel='next' title='"; |
| 1241 | $link .= esc_attr( $title ); |
| 1242 | $link .= "' href='" . get_permalink( $post ) . "' />\n"; |
| 1243 | |
| 1244 | $adjacent = $previous ? 'previous' : 'next'; |
| 1245 | return apply_filters( "{$adjacent}_post_rel_link", $link ); |
| 1246 | } |
| 1247 | |
| 1248 | /** |
| 1249 | * Display relational links for the posts adjacent to the current post. |
| 1250 | * |
| 1251 | * @since 2.8.0 |
| 1252 | * |
| 1253 | * @param string $title Optional. Link title format. |
| 1254 | * @param bool $in_same_term Optional. Whether link should be in a same taxonomy term. |