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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 |
|---|---|
| 2036 | /** |
| 2037 | * Filters the returned comment ID fields. |
| 2038 | * |
| 2039 | * @since 3.0.0 |
| 2040 | * |
| 2041 | * @param string $comment_id_fields The HTML-formatted hidden ID field comment elements. |
| 2042 | * @param int $post_id The post ID. |
| 2043 | * @param int $reply_to_id The ID of the comment being replied to. |
| 2044 | */ |
| 2045 | return apply_filters( 'comment_id_fields', $comment_id_fields, $post_id, $reply_to_id ); |
| 2046 | } |
| 2047 | |
| 2048 | /** |
| 2049 | * Outputs hidden input HTML for replying to comments. |
| 2050 | * |
| 2051 | * Adds two hidden inputs to the comment form to identify the `comment_post_ID` |
| 2052 | * and `comment_parent` values for threaded comments. |
| 2053 | * |
| 2054 | * This tag must be within the `<form>` section of the `comments.php` template. |