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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 |
|---|---|
| 2194 | /** This filter is documented in wp-includes/comment.php */ |
| 2195 | $commentdata['comment_author'] = apply_filters( 'pre_comment_author_name', $commentdata['comment_author'] ); |
| 2196 | /** |
| 2197 | * Filter the comment content before it is set. |
| 2198 | * |
| 2199 | * @since 1.5.0 |
| 2200 | * |
| 2201 | * @param int $comment_content The comment content. |
| 2202 | */ |
| 2203 | $commentdata['comment_content'] = apply_filters( 'pre_comment_content', $commentdata['comment_content'] ); |
| 2204 | /** |
| 2205 | * Filter the comment author's IP before it is set. |
| 2206 | * |
| 2207 | * @since 1.5.0 |
| 2208 | * |
| 2209 | * @param int $comment_author_ip The comment author's IP. |
| 2210 | */ |
| 2211 | $commentdata['comment_author_IP'] = apply_filters( 'pre_comment_user_ip', $commentdata['comment_author_IP'] ); |
| 2212 | /** This filter is documented in wp-includes/comment.php */ |