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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 |
|---|---|
| 1491 | $respond_link = get_permalink() . '#respond'; |
| 1492 | /** |
| 1493 | * Filter the respond link when a post has no comments. |
| 1494 | * |
| 1495 | * @since 4.4.0 |
| 1496 | * |
| 1497 | * @param string $respond_link The default response link. |
| 1498 | * @param integer $id The post ID. |
| 1499 | */ |
| 1500 | echo apply_filters( 'respond_link', $respond_link, $id ); |
| 1501 | } else { |
| 1502 | comments_link(); |
| 1503 | } |
| 1504 | echo '"'; |
| 1505 | } |
| 1506 | |
| 1507 | if ( !empty( $css_class ) ) { |
| 1508 | echo ' class="'.$css_class.'" '; |
| 1509 | } |