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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 |
|---|---|
| 2674 | * |
| 2675 | * The submit field includes the submit button, hidden fields for the |
| 2676 | * comment form, and any wrapper markup. |
| 2677 | * |
| 2678 | * @since 4.2.0 |
| 2679 | * |
| 2680 | * @param string $submit_field HTML markup for the submit field. |
| 2681 | * @param array $args Arguments passed to comment_form(). |
| 2682 | */ |
| 2683 | echo apply_filters( 'comment_form_submit_field', $submit_field, $args ); |
| 2684 | |
| 2685 | /** |
| 2686 | * Fires at the bottom of the comment form, inside the closing form tag. |
| 2687 | * |
| 2688 | * @since 1.5.0 |
| 2689 | * |
| 2690 | * @param int $post_id The post ID. |
| 2691 | */ |
| 2692 | do_action( 'comment_form', $post_id ); |