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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 |
---|---|
1227 | $title = str_replace('%title', $post_title, $title); |
1228 | $title = str_replace('%date', $date, $title); |
1229 | $title = apply_filters('the_title', $title, $post->ID); |
1230 |
|
1231 | $link = $previous ? "<link rel='prev' title='" : "<link rel='next' title='"; |
1232 | $link .= esc_attr( $title ); |
1233 | $link .= "' href='" . get_permalink($post) . "' />\n"; |
1234 |
|
1235 | $adjacent = $previous ? 'previous' : 'next'; |
1236 | return apply_filters( "{$adjacent}_post_rel_link", $link ); |
1237 | } |
1238 |
|
1239 | /** |
1240 | * Display relational links for the posts adjacent to the current post. |
1241 | * |
1242 | * @since 2.8.0 |
1243 | * |
1244 | * @param string $title Optional. Link title format. |
1245 | * @param bool $in_same_cat Optional. Whether link should be in a same category. |