validate_url(&$url)

process($url, $data)

convert_ascii($str)

convert_xml($str)

data($item)

limit_characters($str[, $n = 500[, $end_char = '…']])

class CI_Trackback $data = array('url' => '', 'title' => '', 'excerpt' => '', 'blog_name'

get_id($url)

set_error($msg)

send_success()