今天想导出下用户的邮箱，但是怎么搞都搞不出。DISCUZ后台的筛选功能的确很强大，但是唯独导出不了email。可能是国内一直不重视邮件吧。自己研究了下，分享给大家：

1. 打开source\class\table\table_common_member.php，在fetch_all_username_by_uid后加上这个function，用于查询email

public function fetch_all_useremail_by_uid($uids) {
$users = array();
if(($uids = dintval($uids, true))) {
foreach($this->fetch_all($uids) as $uid => $value) {
$users[$uid] = $value['email'];
}
}
return $users;
}

2. 找到source\admincp\admincp_members.php ，查询 elseif($operation == ‘export’) {，做以下修改：

代码贴在这里：

$alluseremail = C::t('common_member')->fetch_all_useremail_by_uid($uids);

$profile = array_merge(array('uid'=>$uid, 'email'=>$alluseremail[$uid], 'username'=>$allusername[$uid]),$profile);

$detail = "UID,"."Email,".$lang['username'].",".$subject."\n".$detail;