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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 |
---|---|
2683 | $title = str_replace('%title', $post->post_title, $title); |
2684 | $title = str_replace('%date', $date, $title); |
2685 | $title = apply_filters('the_title', $title, $post->ID); |
2686 |
|
2687 | $link = $start ? "<link rel='start' title='" : "<link rel='end' title='"; |
2688 | $link .= esc_attr($title); |
2689 | $link .= "' href='" . get_permalink($post) . "' />\n"; |
2690 |
|
2691 | $boundary = $start ? 'start' : 'end'; |
2692 | return apply_filters( "{$boundary}_post_rel_link", $link ); |
2693 | } |
2694 |
|
2695 | /** |
2696 | * Display relational link for the first post. |
2697 | * |
2698 | * @since 2.8.0 |
2699 | * @deprecated 3.3.0 |
2700 | * |
2701 | * @param string $title Optional. Link title format. |