g5_url 은 어떻게 정의 되나요?

function g5_path(){    $result['path'] = str_replace('\\', '/', dirname(__FILE__));    $tilde_remove = preg_replace('/^\/\~[^\/]+(.*)$/', '$1', $_SERVER['SCRIPT_NAME']);    $document_root = str_replace($tilde_remove, '', $_SERVER['SCRIPT_FILENAME']);    $root = str_replace($document_root, '', $result['path']);    $port = $_SERVER['SERVER_PORT'] != 80 ? ':'.$_SERVER['SERVER_PORT'] : '';    $http = 'http' . ((isset($_SERVER['HTTPS']) && $_SERVER['HTTPS']=='on') ? 's' : '') . '://';    $user = str_replace(str_replace($document_root, '', $_SERVER['SCRIPT_FILENAME']), '', $_SERVER['SCRIPT_NAME']);    $host = isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : $_SERVER['SERVER_NAME'];    if(isset($_SERVER['HTTP_HOST']) && preg_match('/:[0-9]+$/', $host))        $host = preg_replace('/:[0-9]+$/', '', $host);    $host = preg_replace("/[\<\>\'\"\\\'\\\"\%\=\(\)\/\^\*]/", '', $host);    $result['url'] = $http.$host.$port.$user.$root;    return $result;}$g5_path = g5_path();