IMAP - msgno 和 uid 之间的区别？
msgno 和 uid 有什么区别？即使消息被删除，它们看起来总是一样的！？
What is the difference between msgno and uid? It looks like they always are the same even if msgs are deleted!?
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正如http://www.php.net/manual/en 上所说/function.imap-uid.php：
此函数返回给定消息序列号的 UID。 UID 是唯一标识符，不会随时间变化，而消息序列号可能会随着邮箱内容的变化而变化。
As it says on http://www.php.net/manual/en/function.imap-uid.php:
This function returns the UID for the given message sequence number. An UID is a unique identifier that will not change over time while a message sequence number may change whenever the content of the mailbox changes.
就我而言，uid 始终与 msgno 和 message_id 相同。
最糟糕的是，当我删除邮件服务器上的邮件时，msgno 和 UID 会按到达顺序重新归因。
我制作了一个小脚本，使用 imap_search 和 imap_overview 获取邮件以获取标头，我使用 imap_uid($this->GetConnection(),$msgno);强制从 MSGNO 获取 UID，结果为：
echo "MSGNO : $msgno UID : $overview->uid UIDBYNO : "。 $mbox->GetUidByNum($msgno)."
";
MSGNO : 851 UID : 851 UIDBYNO : 851
MSGNO : 852 UID : 852 UIDBYNO : 852
MSGNO : 853 UID : 853 UIDBYNO : 853
MSGNO : 854 UID : 854 UIDBYNO : 854
MSGNO : 855 UID : 855 UIDBYNO : 855
MSGNO : 856 UID : 856 UIDBYNO : 856
MSGNO : 857 UID : 857 UIDBYNO : 857
所以
1）uid不是唯一的
2) msgno 始终与 uid 相同
也许邮件服务器不尊重 RFC！
In my case, uid is always the same as msgno and message_id
The worst it's that when i delete messages on the mail server, msgno and UID are reattributed in the order of arrival.
I have make a little script which fetch mails with imap_search and imap_overview to get headers, i use imap_uid($this->GetConnection(),$msgno); to force get the UID from the MSGNO and here the result :
echo "MSGNO : $msgno UID : $overview->uid UIDBYNO : ". $mbox->GetUidByNum($msgno)."
";
MSGNO : 851 UID : 851 UIDBYNO : 851
MSGNO : 852 UID : 852 UIDBYNO : 852
MSGNO : 853 UID : 853 UIDBYNO : 853
MSGNO : 854 UID : 854 UIDBYNO : 854
MSGNO : 855 UID : 855 UIDBYNO : 855
MSGNO : 856 UID : 856 UIDBYNO : 856
MSGNO : 857 UID : 857 UIDBYNO : 857
So
1) uid isn't unique
2) msgno is always the same as uid
Maybe the mailserver doesn't respect the RFC !