Imbo\Helpers\Urls::buildFromParseUrlParts PHP Method

    public static function buildFromParseUrlParts(array $parts)
    {
        $url = '';
        $url .= isset($parts['scheme']) ? $parts['scheme'] : 'http';
        $url .= '://';
        if (isset($parts['user'])) {
            $url .= $parts['user'];
            if (isset($parts['pass'])) {
                $url .= ':' . $parts['pass'];
            }
            $url .= '@';
        }
        $url .= isset($parts['host']) ? $parts['host'] : '';
        $url .= isset($parts['port']) ? ':' . $parts['port'] : '';
        $url .= isset($parts['path']) ? $parts['path'] : '';
        $url .= isset($parts['query']) ? '?' . $parts['query'] : '';
        $url .= isset($parts['fragment']) ? '#' . $parts['fragment'] : '';
        return $url;
    }

 /**
  * Helper method to generate an alternative form of an URL, where array indices have either
  * been added or removed. foo[] is transformed into foo[0], while foo[0] is transformed into foo[].
  *
  * The result for URLs with both formats is undefined, or for URLs that intermingle their parameters,
  * i.e. t[]=foo&b[]=bar&t[]=baz
  *
  * This was introduced because of differences between the URLs generated by the different clients, and
  * because Facebook (at least) generates URLs were []s in URL arguments are expanded to [0] when
  * requested from the backend. Since we sign our URLs, this breaks the token generation and thus breaks
  * URLs when Facebook attempts to retrieve them.
  *
  * @param string $url The URL to generate the alternative form of
  * @param int $encoding The encoding to use - from GuzzleHttp\Psr7
  * @return string
  */
 protected function getAlternativeURL($url, $encoding = PHP_QUERY_RFC3986)
 {
     $urlParts = parse_url($url);
     if (!isset($urlParts['query'])) {
         return $url;
     }
     $queryString = $urlParts['query'];
     $fixKeyPattern = '#\\[[0-9]+\\]$#';
     $parsed = Psr7\parse_query($queryString);
     $newArguments = array();
     foreach ($parsed as $key => $value) {
         $fixedKey = preg_replace($fixKeyPattern, '', $key);
         // if the key came out different, we're talking about a t[x] format - so we store those
         // to allow for the correct sequence when regenerating the URL further below.
         if ($fixedKey != $key) {
             $fixedKey .= '[]';
             if (!isset($newArguments[$fixedKey])) {
                 $newArguments[$fixedKey] = array();
             }
             $newArguments[$fixedKey][] = $value;
         } else {
             if (is_array($value) && substr($key, -2) == '[]') {
                 // if the value is an array, and we have the [] format already, we expand the keys
                 foreach ($value as $innerKey => $innerValue) {
                     // remove [] from the key and append the inner array key
                     $indexedKey = substr($key, 0, -2) . '[' . $innerKey . ']';
                     $newArguments[$indexedKey] = $innerValue;
                 }
             } else {
                 $newArguments[$key] = $value;
             }
         }
     }
     $urlParts['query'] = Psr7\build_query($newArguments, $encoding);
     $url = Urls::buildFromParseUrlParts($urlParts);
     return $url;
 }