Piwik\SettingsServer::isIIS PHP Method

    public static function isIIS()
    {
        $iis = isset($_SERVER['SERVER_SOFTWARE']) && preg_match('/^Microsoft-IIS\\/(.+)/', $_SERVER['SERVER_SOFTWARE'], $matches) && version_compare($matches[1], '7') >= 0;
        return $iis;
    }

    /**
     * Generate IIS web.config files to restrict access
     *
     * Note: for IIS 7 and above
     */
    public static function createWebConfigFiles()
    {
        if (!SettingsServer::isIIS()) {
            return;
        }
        @file_put_contents(PIWIK_INCLUDE_PATH . '/web.config', '<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <system.webServer>
    <security>
      <requestFiltering>
        <hiddenSegments>
          <add segment="config" />
          <add segment="core" />
          <add segment="lang" />
          <add segment="tmp" />
        </hiddenSegments>
        <fileExtensions>
          <add fileExtension=".tpl" allowed="false" />
          <add fileExtension=".twig" allowed="false" />
          <add fileExtension=".php4" allowed="false" />
          <add fileExtension=".php5" allowed="false" />
          <add fileExtension=".inc" allowed="false" />
          <add fileExtension=".in" allowed="false" />
          <add fileExtension=".csv" allowed="false" />
          <add fileExtension=".pdf" allowed="false" />
          <add fileExtension=".log" allowed="false" />
        </fileExtensions>
      </requestFiltering>
    </security>
    <directoryBrowse enabled="false" />
    <defaultDocument>
      <files>
        <remove value="index.php" />
        <add value="index.php" />
      </files>
    </defaultDocument>
    <staticContent>
      <remove fileExtension=".svg" />
      <mimeMap fileExtension=".svg" mimeType="image/svg+xml" />
    </staticContent>
  </system.webServer>
</configuration>');
        // deny direct access to .php files
        $directoriesToProtect = array('/libs', '/vendor', '/plugins');
        foreach ($directoriesToProtect as $directoryToProtect) {
            @file_put_contents(PIWIK_INCLUDE_PATH . $directoryToProtect . '/web.config', '<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <system.webServer>
    <security>
      <requestFiltering>
        <denyUrlSequences>
          <add sequence=".php" />
        </denyUrlSequences>
      </requestFiltering>
    </security>
  </system.webServer>
</configuration>');
        }
    }