Misc::fix_protocol( string $url, int $http = 1 ): string

175    public static function fix_protocol(string $url, int $http = 1)176    {177        $url = Misc::normalize_url($url);178        $parsed = Misc::parse_url($url);179        if ($parsed['scheme'] !== '' && $parsed['scheme'] !== 'http' && $parsed['scheme'] !== 'https') {180            return Misc::fix_protocol(Misc::compress_parse_url('http', $parsed['authority'], $parsed['path'], $parsed['query'], $parsed['fragment']), $http);181        }182 183        if ($parsed['scheme'] === '' && $parsed['authority'] === '' && !file_exists($url)) {184            return Misc::fix_protocol(Misc::compress_parse_url('http', $parsed['path'], '', $parsed['query'], $parsed['fragment']), $http);185        }186 187        if ($http === 2 && $parsed['scheme'] !== '') {188            return "feed:$url";189        } elseif ($http === 3 && strtolower($parsed['scheme']) === 'http') {190            return substr_replace($url, 'podcast', 0, 4);191        } elseif ($http === 4 && strtolower($parsed['scheme']) === 'http') {192            return substr_replace($url, 'itpc', 0, 4);193        }194 195        return $url;196    }