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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 |
|---|---|
| 1667 | */ |
| 1668 | $commentdata['comment_content'] = apply_filters( 'pre_comment_content', $commentdata['comment_content'] ); |
| 1669 | /** |
| 1670 | * Filters the comment author's IP before it is set. |
| 1671 | * |
| 1672 | * @since 1.5.0 |
| 1673 | * |
| 1674 | * @param string $comment_author_ip The comment author's IP. |
| 1675 | */ |
| 1676 | $commentdata['comment_author_IP'] = apply_filters( 'pre_comment_user_ip', $commentdata['comment_author_IP'] ); |
| 1677 | /** This filter is documented in wp-includes/comment.php */ |
| 1678 | $commentdata['comment_author_url'] = apply_filters( 'pre_comment_author_url', $commentdata['comment_author_url'] ); |
| 1679 | /** This filter is documented in wp-includes/comment.php */ |
| 1680 | $commentdata['comment_author_email'] = apply_filters( 'pre_comment_author_email', $commentdata['comment_author_email'] ); |
| 1681 | $commentdata['filtered'] = true; |
| 1682 | return $commentdata; |
| 1683 | } |
| 1684 | |
| 1685 | /** |