wordpress feed增加自定义字段

直接在functions.php里面，追加自定义字段到feed item里面。

function fix_for_360_rss2_item() {    $fields = array('_addlink_info_gglink');    $post_id = get_the_ID();    foreach($fields as $field){        if ($value = get_post_meta($post_id,$field,true)){            if($field == '_addlink_info_gglink'){                $field = 'packagename';                preg_match('/id=(.*)&/', $value, $r);                if($r && !empty($r[1])){                    echo "<{$field}><![CDATA[{$r[1]}]]></{$field}>\n";                }            }        }    }}add_action('rss2_item', 'fix_for_360_rss2_item');