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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 |
|---|---|
| 1648 | $respond_link = get_permalink() . '#respond'; |
| 1649 | /** |
| 1650 | * Filters the respond link when a post has no comments. |
| 1651 | * |
| 1652 | * @since 4.4.0 |
| 1653 | * |
| 1654 | * @param string $respond_link The default response link. |
| 1655 | * @param int $post_id The post ID. |
| 1656 | */ |
| 1657 | echo apply_filters( 'respond_link', $respond_link, $post_id ); |
| 1658 | } else { |
| 1659 | comments_link(); |
| 1660 | } |
| 1661 | echo '"'; |
| 1662 | |
| 1663 | if ( ! empty( $css_class ) ) { |
| 1664 | echo ' class="' . $css_class . '" '; |
| 1665 | } |
| 1666 | |