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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 |
|---|---|
| 187 | if ( $wpdb->get_var($dupe) ) |
| 188 | wp_die( __('Duplicate comment detected; it looks as though you\'ve already said that!') ); |
| 189 | |
| 190 | // Simple flood-protection |
| 191 | if ( $lasttime = $wpdb->get_var("SELECT comment_date_gmt FROM $wpdb->comments WHERE comment_author_IP = '$comment_author_IP' OR comment_author_email = '$comment_author_email' ORDER BY comment_date DESC LIMIT 1") ) { |
| 192 | $time_lastcomment = mysql2date('U', $lasttime); |
| 193 | $time_newcomment = mysql2date('U', $comment_date_gmt); |
| 194 | $flood_die = apply_filters('comment_flood_filter', false, $time_lastcomment, $time_newcomment); |
| 195 | if ( $flood_die ) { |
| 196 | do_action('comment_flood_trigger', $time_lastcomment, $time_newcomment); |
| 197 | wp_die( __('You are posting comments too quickly. Slow down.') ); |
| 198 | } |
| 199 | } |
| 200 | |
| 201 | if ( $user_id ) { |
| 202 | $userdata = get_userdata($user_id); |
| 203 | $user = new WP_User($user_id); |
| 204 | $post_author = $wpdb->get_var("SELECT post_author FROM $wpdb->posts WHERE ID = '$comment_post_ID' LIMIT 1"); |
| 205 | } |