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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 |
|---|---|
| 3469 | } elseif ( post_password_required( $comment_post_ID ) ) { |
| 3470 | |
| 3471 | /** |
| 3472 | * Fires when a comment is attempted on a password-protected post. |
| 3473 | * |
| 3474 | * @since 2.9.0 |
| 3475 | * |
| 3476 | * @param int $comment_post_ID Post ID. |
| 3477 | */ |
| 3478 | do_action( 'comment_on_password_protected', $comment_post_ID ); |
| 3479 | |
| 3480 | return new WP_Error( 'comment_on_password_protected' ); |
| 3481 | |
| 3482 | } else { |
| 3483 | |
| 3484 | /** |
| 3485 | * Fires before a comment is posted. |
| 3486 | * |
| 3487 | * @since 2.8.0 |