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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 |
|---|---|
| 1926 | /** |
| 1927 | * Filters the returned comment ID fields. |
| 1928 | * |
| 1929 | * @since 3.0.0 |
| 1930 | * |
| 1931 | * @param string $result The HTML-formatted hidden ID field comment elements. |
| 1932 | * @param int $post_id The post ID. |
| 1933 | * @param int $reply_to_id The ID of the comment being replied to. |
| 1934 | */ |
| 1935 | return apply_filters( 'comment_id_fields', $result, $post_id, $reply_to_id ); |
| 1936 | } |
| 1937 | |
| 1938 | /** |
| 1939 | * Outputs hidden input HTML for replying to comments. |
| 1940 | * |
| 1941 | * Adds two hidden inputs to the comment form to identify the `comment_post_ID` |
| 1942 | * and `comment_parent` values for threaded comments. |
| 1943 | * |
| 1944 | * This tag must be within the `<form>` section of the `comments.php` template. |