GuzzleHttp\Psr7\Uri::fromParts PHP Method

    public static function fromParts(array $parts)
    {
        $uri = new self();
        $uri->applyParts($parts);
        $uri->validateState();
        return $uri;
    }

 /**
  * {@inheritdoc}
  */
 public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property)
 {
     // Only apply to a full URL.
     if (is_string($value) && strpos($value, '://') > 0) {
         // URL encode everything after the hostname.
         $parsed_url = parse_url($value);
         // Fail on seriously malformed URLs.
         if ($parsed_url === FALSE) {
             throw new MigrateException("Value '{$value}' is not a valid URL");
         }
         // Iterate over specific pieces of the URL rawurlencoding each one.
         $url_parts_to_encode = array('path', 'query', 'fragment');
         foreach ($parsed_url as $parsed_url_key => $parsed_url_value) {
             if (in_array($parsed_url_key, $url_parts_to_encode)) {
                 // urlencode() would convert spaces to + signs.
                 $urlencoded_parsed_url_value = rawurlencode($parsed_url_value);
                 // Restore special characters depending on which part of the URL this is.
                 switch ($parsed_url_key) {
                     case 'query':
                         $urlencoded_parsed_url_value = str_replace('%26', '&', $urlencoded_parsed_url_value);
                         break;
                     case 'path':
                         $urlencoded_parsed_url_value = str_replace('%2F', '/', $urlencoded_parsed_url_value);
                         break;
                 }
                 $parsed_url[$parsed_url_key] = $urlencoded_parsed_url_value;
             }
         }
         $value = (string) Uri::fromParts($parsed_url);
     }
     return $value;
 }