自用正規整理

自用正则

$email_reg   = '/[a-z0-9]+[-_.]*[a-z0-9]*@[a-z0-9]+[-_]*[a-z0-9]*(?:[.]屁屁[a-z0-9]{2,4})+/';

$url_reg     = '//';

$img_reg     = '//';