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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 |
|---|---|
| 2464 | |
| 2465 | if ( get_option( 'comment_registration' ) && ! is_user_logged_in() ) : |
| 2466 | |
| 2467 | echo $args['must_log_in']; |
| 2468 | /** |
| 2469 | * Fires after the HTML-formatted 'must log in after' message in the comment form. |
| 2470 | * |
| 2471 | * @since 3.0.0 |
| 2472 | */ |
| 2473 | do_action( 'comment_form_must_log_in_after' ); |
| 2474 | |
| 2475 | else : |
| 2476 | |
| 2477 | printf( |
| 2478 | '<form action="%s" method="post" id="%s" class="%s"%s>', |
| 2479 | esc_url( $args['action'] ), |
| 2480 | esc_attr( $args['id_form'] ), |
| 2481 | esc_attr( $args['class_form'] ), |
| 2482 | ( $html5 ? ' novalidate' : '' ) |