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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 |
|---|---|
| 2098 | */ |
| 2099 | $commentdata['comment_content'] = apply_filters( 'pre_comment_content', $commentdata['comment_content'] ); |
| 2100 | /** |
| 2101 | * Filters the comment author's IP address before it is set. |
| 2102 | * |
| 2103 | * @since 1.5.0 |
| 2104 | * |
| 2105 | * @param string $comment_author_ip The comment author's IP address. |
| 2106 | */ |
| 2107 | $commentdata['comment_author_IP'] = apply_filters( 'pre_comment_user_ip', $commentdata['comment_author_IP'] ); |
| 2108 | /** This filter is documented in wp-includes/comment.php */ |
| 2109 | $commentdata['comment_author_url'] = apply_filters( 'pre_comment_author_url', $commentdata['comment_author_url'] ); |
| 2110 | /** This filter is documented in wp-includes/comment.php */ |
| 2111 | $commentdata['comment_author_email'] = apply_filters( 'pre_comment_author_email', $commentdata['comment_author_email'] ); |
| 2112 | $commentdata['filtered'] = true; |
| 2113 | return $commentdata; |
| 2114 | } |
| 2115 | |
| 2116 | /** |