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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 |
|---|---|
| 2205 | |
| 2206 | /** |
| 2207 | * Filters a comment's data before it is sanitized and inserted into the database. |
| 2208 | * |
| 2209 | * @since 1.5.0 |
| 2210 | * @since 5.6.0 Comment data includes the `comment_agent` and `comment_author_IP` values. |
| 2211 | * |
| 2212 | * @param array $commentdata Comment data. |
| 2213 | */ |
| 2214 | $commentdata = apply_filters( 'preprocess_comment', $commentdata ); |
| 2215 | |
| 2216 | $commentdata['comment_post_ID'] = (int) $commentdata['comment_post_ID']; |
| 2217 | if ( isset( $commentdata['user_ID'] ) && $prefiltered_user_id !== (int) $commentdata['user_ID'] ) { |
| 2218 | $commentdata['user_ID'] = (int) $commentdata['user_ID']; |
| 2219 | $commentdata['user_id'] = $commentdata['user_ID']; |
| 2220 | } elseif ( isset( $commentdata['user_id'] ) ) { |
| 2221 | $commentdata['user_id'] = (int) $commentdata['user_id']; |
| 2222 | } |
| 2223 | |