找到user.php 的以下代码：

 if (empty($_POST['captcha'])) { show_message($_LANG['invalid_captcha'], $_LANG['relogin_lnk'], 'user.php', 'error'); } 

　　后面增加：

 if(is_email($username)) { $sql ="select user_name from ".$ecs->table('users')." where email='".$username."'"; $username_e = $db->getOne($sql); if($username_e) $username=$username_e; } if(is_telephone($username)) { $sql ="select user_name from ".$ecs->table('users')." where mobile_phone='".$username."'"; $username_e = $db->getOne($sql); if($username_e) $username=$username_e; } 

　　然后在user.php的最底部添加：

 function is_telephone($phone){ $chars = "/^13[0-9]{1}[0-9]{8}$|15[0-9]{1}[0-9]{8}$|18[0-9]{1}[0-9]{8}$/"; if (preg_match($chars, $phone)){ return true; } }