# imap_msgno

(PHP 4, PHP 5, PHP 7)

imap_msgno — Gets the message sequence number for the given UID

### 说明

imap_msgno ( resource `$imap_stream` , int `$uid` ) : int

Returns the message sequence number for the given `uid`.

This function is the inverse of imap_uid().

### 参数

`imap_stream`

  由 imap_open() 返回的 IMAP 流。

`uid`

  The message UID

### 返回值

Returns the message sequence number for the given `uid`.

### 参见

- imap_uid() - This function returns the UID for the given message sequence number