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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 |
|---|---|
| 330 | // Simple duplicate check |
| 331 | // expected_slashed ($comment_post_ID, $comment_author, $comment_author_email, $comment_content) |
| 332 | $dupe = "SELECT comment_ID FROM $wpdb->comments WHERE comment_post_ID = '$comment_post_ID' AND ( comment_author = '$comment_author' "; |
| 333 | if ( $comment_author_email ) |
| 334 | $dupe .= "OR comment_author_email = '$comment_author_email' "; |
| 335 | $dupe .= ") AND comment_content = '$comment_content' LIMIT 1"; |
| 336 | if ( $wpdb->get_var($dupe) ) |
| 337 | wp_die( __('Duplicate comment detected; it looks as though you\'ve already said that!') ); |
| 338 | |
| 339 | do_action( 'check_comment_flood', $comment_author_IP, $comment_author_email, $comment_date_gmt ); |
| 340 | |
| 341 | if ( $user_id ) { |
| 342 | $userdata = get_userdata($user_id); |
| 343 | $user = new WP_User($user_id); |
| 344 | $post_author = $wpdb->get_var($wpdb->prepare("SELECT post_author FROM $wpdb->posts WHERE ID = %d LIMIT 1", $comment_post_ID)); |
| 345 | } |
| 346 | |
| 347 | if ( $userdata && ( $user_id == $post_author || $user->has_cap('level_9') ) ) { |
| 348 | // The author and the admins get respect. |