Unmark the message which is marked deleted

# imap_undelete

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

imap_undelete — Unmark the message which is marked deleted

### 说明

function imap_undelete(IMAP\Connection `$imap`, string `$message_nums`, int `$flags` = 0): true

Removes the deletion flag for a specified message, which is set by imap_delete() or imap_mail_move().

### 参数

`imap`
  IMAP\Connection 实例。
`message_nums`

  A string representing one or more messages in IMAP4-style sequence format (`"n"`, `"n:m"`, or combination of these delimited by commas).

`flags`

### 返回值

总是返回 `true`。

### 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_delete() - Mark a message for deletion from current mailbox
- imap_mail_move() - Move specified messages to a mailbox

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