xoopsのcheckemail関数より
if (!$email || !preg_match("/^[_a-z0-9-]+(.[_a-z0-9-]+)*@[a-z0-9-]+([.][a-z0-9-]+)+$/i",$email)){ return false; }
http://xoops.org/modules/news/article.php?com_mode=flat&com_order=1&storyid=3493
xoopsのcheckemail関数より
if (!$email || !preg_match("/^[_a-z0-9-]+(.[_a-z0-9-]+)*@[a-z0-9-]+([.][a-z0-9-]+)+$/i",$email)){ return false; }
http://xoops.org/modules/news/article.php?com_mode=flat&com_order=1&storyid=3493