PHPDaemon\Clients\IMAP\Connection::decodeSize PHP Method

    protected function decodeSize($lines)
    {
        $sizes = [];
        foreach (array_map([$this, 'decodeLine'], $lines) as $tokens) {
            if (!isset($tokens[1]) || $tokens[1] !== 'FETCH') {
                continue;
            }
            if (!isset($tokens[2][0]) || $tokens[2][0] !== 'UID') {
                continue;
            }
            if (!isset($tokens[2][2]) || $tokens[2][2] !== 'RFC822.SIZE') {
                continue;
            }
            if (!isset($tokens[2][1]) || !isset($tokens[2][3])) {
                continue;
            }
            $sizes[$tokens[2][1]] = $tokens[2][3];
        }
        return $sizes;
    }