# imap_headers

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

imap_headers — Returns headers for all messages in a mailbox

### Descripción

imap_headers(IMAP\Connection `$imap`): array|false

Returns headers for all messages in a mailbox.

### Parámetros

`imap`

  An IMAP\Connection instance.

### Valores devueltos

Returns an array of string formatted with header info. One element per mail message. Returns `false` on failure.

### Historial de cambios

Versión | Descripción
--- | ---
8.1.0 | The `imap` parameter expects an IMAP\Connection instance now; previously, a valid `imap` recurso was expected.