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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 |
|---|---|
| 1539 | $respond_link = get_permalink() . '#respond'; |
| 1540 | /** |
| 1541 | * Filters the respond link when a post has no comments. |
| 1542 | * |
| 1543 | * @since 4.4.0 |
| 1544 | * |
| 1545 | * @param string $respond_link The default response link. |
| 1546 | * @param integer $id The post ID. |
| 1547 | */ |
| 1548 | echo apply_filters( 'respond_link', $respond_link, $id ); |
| 1549 | } else { |
| 1550 | comments_link(); |
| 1551 | } |
| 1552 | echo '"'; |
| 1553 | |
| 1554 | if ( !empty( $css_class ) ) { |
| 1555 | echo ' class="'.$css_class.'" '; |
| 1556 | } |
| 1557 | |