# imap_msgno

(PHP 4, PHP 5, PHP 7, PHP 8)

imap_msgno — Gets the message sequence number for the given UID

### 说明

imap_msgno(IMAP\Connection `$imap`, int `$message_uid`): int

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

This function is the inverse of imap_uid().

### 参数

`imap`

  IMAP\Connection 实例。

`message_uid`

  The message UID

### 返回值

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

### 更新日志

版本 | 说明
--- | ---
8.1.0 | 现在 `imap` 参数接受 IMAP\Connection 实例，之前接受有效的 `imap` resource。

### 参见

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

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