Sync email accounts through imap on Plesk 12 Ubuntu/Debian

#!/usr/bin/php
<?php
    // Edit this to your needs (only need to change source, as target is your local server)
    $source_connectionstring = "{127.0.0.1:993/imap/ssl/novalidate-cert}";
    $target_connectionstring = "{localhost:143/imap/notls}";

    // Basic requirements check
    if (!function_exists('mcrypt_decrypt'))
        die('You need php\'s mcrypt extension in order for this tool to work.'.PHP_EOL);
    if (!function_exists('imap_open'))
        die('You need php\'s imap extension in order for this tool to work.'.PHP_EOL);
    if (!function_exists('mb_convert_encoding'))
        die('You need php\'s multibyte extension in order for this tool to work.'.PHP_EOL);

    $mycnf = parse_ini_file('/etc/mysql/debian.cnf');
    $secret = file_get_contents('/etc/psa/private/secret_key');

    $db = new mysqli($mycnf['host'], $mycnf['user'], $mycnf['password'], 'psa' );

    function connect_imap($con, $ro = false)
    {
        global $user, $password;
        $imap = @imap_open($con, $user, $password, ($ro ? OP_READONLY : OP_HALFOPEN), 10);
        if (!$imap)
        {
            echo 'Unable to connect to ' . $con . ' : ' . imap_last_error() . PHP_EOL;
            return false;
        }
        return $imap;
    }

    $result = $db->query("SELECT CONCAT(mail_name,'@',name) as email,accounts.password FROM mail LEFT JOIN domains on domains.id=mail.dom_id LEFT JOIN accounts on accounts.id=mail.account_id");
    while ($row = $result->fetch_assoc())
    {
        // No password? Then it's a forward, no need to sync
        if (empty($row['password']))
            continue;

        $user = $row['email'];
        $hash = explode('$', $row['password']);
        $iv = base64_decode($hash[2]);
        $ct = base64_decode($hash[3]);
        $password = str_replace("\0", '', mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $secret, $ct , MCRYPT_MODE_CBC, $iv));

        echo 'Syncing account '. $user . PHP_EOL;

        $source_imap = connect_imap($source_connectionstring, true);
        if (!$source_imap) continue;

        $target_imap = connect_imap($target_connectionstring);
        if (!$target_imap) continue;

        $targetfolders = array();
        $target_folders = imap_list($target_imap, $target_connectionstring, '*');
        if ($target_folders !== false)
        {
            foreach($target_folders AS $folder)
                $targetfolders[] = str_replace($target_connectionstring, '', $folder);
        }

        $source_folders = imap_list($source_imap, $source_connectionstring, '*');
        if ($source_folders !== false)
        {
            $migratedfolders = array();
            foreach ($source_folders as $value)
            {
                $folderpath = str_replace($source_connectionstring, '', $value);
                if(in_array($folderpath, $migratedfolders))
                    continue;

                $targetroot = mb_convert_encoding($folderpath, "UTF7-IMAP","ISO-8859-15");
                echo ' - Folder: ' . $targetroot . PHP_EOL;

                if (!in_array($targetroot, $targetfolders))
                {
                    echo 'Creating ' . $targetroot . PHP_EOL;
                    if(!imap_createmailbox($target_imap, $target_connectionstring . $targetroot))
                    {
                        echo 'Error creating the targetfolder ' . $folderpath . ':' . imap_last_error() . PHP_EOL;
                        continue;
                    }
                }

                imap_reopen($source_imap, $source_connectionstring . $targetroot, OP_READONLY);
                $MC = imap_check($source_imap);
                $count = intval($MC->Nmsgs);
                echo ' - Messages: ' . $count . PHP_EOL;

                if ($count)
                {
                    $src_messages = array();
                    $counter = 0;
                    $fetchresult = imap_fetch_overview($source_imap, '1:' . $count, 0);
                    foreach ($fetchresult as $overview)
                    {
                        $flags = array();
                        if ($overview->flagged) $flags[] = '\Flagged';
                        if ($overview->answered) $flags[] = '\Answered';
                        if ($overview->deleted) $flags[] = '\Deleted';
                        if ($overview->seen) $flags[] = '\Seen';
                        if ($overview->draft) $flags[] = '\Draft';

                        $src_messages[$counter] = $overview;
                        $src_messages[$counter]->flags = implode(' ',$flags);
                        $src_messages[$counter]->internaldate = gmdate('d-M-Y H:i:s O', $overview->udate);

                        if (!isset($overview->message_id))
                            $src_messages[$counter]->message_id = md5($overview->udate . '+' . $overview->size);

                        $counter++;
                    }

                    // Remove messages we already have
                    imap_reopen($target_imap, $target_connectionstring . $targetroot);
                    $MC = imap_check($target_imap);
                    $fetchresult2 = imap_fetch_overview($target_imap, '1:' . $MC->Nmsgs, 0);
                    foreach ($fetchresult2 as $overview)
                    {
                        foreach(array_keys($src_messages) AS $src)
                        {
                            if (!isset($overview->message_id))
                                $overview->message_id = md5($overview->udate . '+' . $overview->size);

                            if ($src_messages[$src]->message_id == $overview->message_id)
                            {
                                unset($src_messages[$src]);
                                break;
                            }
                        }
                    }
                    echo ' - Need to copy ' . count($src_messages) . ' mails.' . PHP_EOL;

                    if (count($src_messages))
                    {
                        foreach ($src_messages AS $message)
                        {
                            echo '   - Transfering ' . $message->message_id . PHP_EOL;
                            $msg = imap_fetchheader($source_imap, $message->msgno) . imap_body($source_imap, $message->msgno);
                            if(!imap_append($target_imap, $target_connectionstring . $targetroot, $msg, $message->flags, $message->internaldate))
                                echo '     - Unable to migrate the email : ' . imap_last_error() . PHP_EOL;
                        }
                    }
                }
                $migratedfolders[] = $folderpath;
            }
        }
        imap_close($source_imap);
        imap_close($target_imap);
    }
?>