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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 |
|---|---|
| 3496 | } elseif ( post_password_required( $comment_post_ID ) ) { |
| 3497 | |
| 3498 | /** |
| 3499 | * Fires when a comment is attempted on a password-protected post. |
| 3500 | * |
| 3501 | * @since 2.9.0 |
| 3502 | * |
| 3503 | * @param int $comment_post_ID Post ID. |
| 3504 | */ |
| 3505 | do_action( 'comment_on_password_protected', $comment_post_ID ); |
| 3506 | |
| 3507 | return new WP_Error( 'comment_on_password_protected' ); |
| 3508 | |
| 3509 | } else { |
| 3510 | |
| 3511 | /** |
| 3512 | * Fires before a comment is posted. |
| 3513 | * |
| 3514 | * @since 2.8.0 |