What function can be used to retrieve information about a mailbox in PHP?

To retrieve information about a mailbox in PHP, you can use the imap_open() function. This function opens an IMAP stream to a mailbox, allowing you to access information such as the number of messages, the size of the mailbox, and other metadata. You can then use other IMAP functions to retrieve specific information about the messages within the mailbox.

$mailbox = '{imap.example.com:993/imap/ssl}INBOX';
$username = 'your_username';
$password = 'your_password';

$imapStream = imap_open($mailbox, $username, $password);

$mailboxInfo = imap_mailboxmsginfo($imapStream);

echo "Number of messages in mailbox: " . $mailboxInfo->Nmsgs . "\n";
echo "Mailbox size: " . $mailboxInfo->Size . " bytes\n";

imap_close($imapStream);