/**
* Check if an URL is valid for a page. Optionally check for duplicate URLs too.
* @param string $url
* @param boolean $allow_dups
* @return false|string
*/
public function validateURL($url, $allow_dups = false, $key = 'url')
{
# Dup checker
if (!$allow_dups) {
if (false !== GWF_Page::getByURL($url)) {
return $this->lang('err_dup_url');
}
}
# Sanitize URL
$_POST[$key] = $url = ltrim(trim($url), '/');
# Just some length check
return GWF_Validator::validateString($this, $key, $url, 4, 255, false);
}