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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 |
|---|---|
| 2366 | * |
| 2367 | * The submit field includes the submit button, hidden fields for the |
| 2368 | * comment form, and any wrapper markup. |
| 2369 | * |
| 2370 | * @since 4.2.0 |
| 2371 | * |
| 2372 | * @param string $submit_field HTML markup for the submit field. |
| 2373 | * @param array $args Arguments passed to comment_form(). |
| 2374 | */ |
| 2375 | echo apply_filters( 'comment_form_submit_field', $submit_field, $args ); |
| 2376 | |
| 2377 | /** |
| 2378 | * Fires at the bottom of the comment form, inside the closing </form> tag. |
| 2379 | * |
| 2380 | * @since 1.5.0 |
| 2381 | * |
| 2382 | * @param int $post_id The post ID. |
| 2383 | */ |
| 2384 | do_action( 'comment_form', $post_id ); |