(PHP 4, PHP 5, PHP 7, PHP 8)
imap_fetch_overview — Read an overview of the information in the headers of the given message
$imap, string $sequence, int $flags = 0): array|false
   This function fetches mail headers for the given
   sequence and returns an overview of their
   contents.
  
imapAn IMAP\Connection instance.
sequence
       A message sequence description. You can enumerate desired messages
       with the X,Y syntax, or retrieve all messages 
       within an interval with the X:Y syntax
      
flags
       sequence will contain a sequence of message
       indices or UIDs, if this parameter is set to 
       FT_UID. 
      
Returns an array of objects describing one message header each. The object will only define a property if it exists. The possible properties are:
subject - the messages subject
     
    from - who sent it
     
    to - recipient
     
    date - when was it sent
     
    message_id - Message-ID
     
    references - is a reference to this message id
     
    in_reply_to - is a reply to this message id
     
    size - size in bytes
     
    uid - UID the message has in the mailbox
     
    msgno - message sequence number in the mailbox
     
    recent - this message is flagged as recent
     
    flagged -  this message is flagged
     
    answered -  this message is flagged as answered
     
    deleted -  this message is flagged for deletion
     
    seen -  this message is flagged as already read
     
    draft -  this message is flagged as being a draft
     
    udate -  the UNIX timestamp of the arrival date
     
    false on failure.
  
 | 版本 | 说明 | 
|---|---|
| 8.1.0 | The imapparameter expects an IMAP\Connection
  instance now; previously, a 资源(resource) was expected. | 
示例 #1 imap_fetch_overview() example
<?php
$mbox = imap_open("{imap.example.org:143}INBOX", "username", "password")
     or die("can't connect: " . imap_last_error());
$MC = imap_check($mbox);
// Fetch an overview for all messages in INBOX
$result = imap_fetch_overview($mbox,"1:{$MC->Nmsgs}",0);
foreach ($result as $overview) {
    echo "#{$overview->msgno} ({$overview->date}) - From: {$overview->from}
    {$overview->subject}\n";
}
imap_close($mbox);
?>