Php/docs/function.imap-headers
来自菜鸟教程
imap_headers
(PHP 4, PHP 5, PHP 7)
imap_headers — Returns headers for all messages in a mailbox
说明
imap_headers
( resource $imap_stream
) : array
Returns headers for all messages in a mailbox.
返回值
Returns an array of string formatted with header info. One element per mail message.