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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 |
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1215 | $cgroupby = "GROUP BY $wpdb->comments.comment_id"; |
1216 | } else { // Other non singular e.g. front |
1217 | $cjoin = "LEFT JOIN $wpdb->posts ON ( $wpdb->comments.comment_post_ID = $wpdb->posts.ID )"; |
1218 | $cwhere = "WHERE post_status = 'publish' AND comment_approved = '1'"; |
1219 | $cgroupby = ''; |
1220 | } |
1221 |
|
1222 | $cjoin = apply_filters('comment_feed_join', $cjoin); |
1223 | $cwhere = apply_filters('comment_feed_where', $cwhere); |
1224 | $cgroupby = apply_filters('comment_feed_groupby', $cgroupby); |
1225 |
|
1226 | $this->comments = (array) $wpdb->get_results("SELECT $distinct $wpdb->comments.* FROM $wpdb->comments $cjoin $cwhere $cgroupby ORDER BY comment_date_gmt DESC LIMIT " . get_option('posts_per_rss')); |
1227 | $this->comment_count = count($this->comments); |
1228 |
|
1229 | $post_ids = array(); |
1230 |
|
1231 | foreach ($this->comments as $comment) |
1232 | $post_ids[] = (int) $comment->comment_post_ID; |
1233 |
|