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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 |
|---|---|
| 449 | return true; |
| 450 | } |
| 451 | |
| 452 | return false; |
| 453 | } |
| 454 | |
| 455 | function wp_new_comment( $commentdata, $spam = false ) { |
| 456 | global $wpdb; |
| 457 | |
| 458 | $commentdata = apply_filters('preprocess_comment', $commentdata); |
| 459 | extract($commentdata); |
| 460 | |
| 461 | $comment_post_ID = (int) $comment_post_ID; |
| 462 | |
| 463 | $user_id = apply_filters('pre_user_id', $user_ID); |
| 464 | $author = apply_filters('pre_comment_author_name', $comment_author); |
| 465 | $email = apply_filters('pre_comment_author_email', $comment_author_email); |
| 466 | $url = apply_filters('pre_comment_author_url', $comment_author_url); |
| 467 | $comment = apply_filters('pre_comment_content', $comment_content); |