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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 |
|---|---|
| 1685 | */ |
| 1686 | function wp_new_comment( $commentdata ) { |
| 1687 | /** |
| 1688 | * Filter a comment's data before it is sanitized and inserted into the database. |
| 1689 | * |
| 1690 | * @since 1.5.0 |
| 1691 | * |
| 1692 | * @param array $commentdata Comment data. |
| 1693 | */ |
| 1694 | $commentdata = apply_filters( 'preprocess_comment', $commentdata ); |
| 1695 | |
| 1696 | $commentdata['comment_post_ID'] = (int) $commentdata['comment_post_ID']; |
| 1697 | if ( isset($commentdata['user_ID']) ) |
| 1698 | $commentdata['user_id'] = $commentdata['user_ID'] = (int) $commentdata['user_ID']; |
| 1699 | elseif ( isset($commentdata['user_id']) ) |
| 1700 | $commentdata['user_id'] = (int) $commentdata['user_id']; |
| 1701 | |
| 1702 | $commentdata['comment_parent'] = isset($commentdata['comment_parent']) ? absint($commentdata['comment_parent']) : 0; |
| 1703 | $parent_status = ( 0 < $commentdata['comment_parent'] ) ? wp_get_comment_status($commentdata['comment_parent']) : ''; |