How can PHP be used to retrieve folders in a mailbox using IMAP?

To retrieve folders in a mailbox using IMAP in PHP, you can use the imap_list function to get a list of available mailboxes. You can then iterate through the list to retrieve the names of the folders.

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

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

$mailboxes = imap_list($connection, $mailbox, '*');

if ($mailboxes) {
    foreach ($mailboxes as $folder) {
        echo "Folder: " . imap_utf7_decode($folder) . "<br>";
    }
} else {
    echo "No folders found.";
}

imap_close($connection);
?>