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  /**
   * This output filter can be any normal PHP function as well as 'xss_clean'
   *
   * WARNING: Using xss_clean will cause a performance hit.  How much is
   * dependant on how much input data there is.
   */
  'output_filter'  => array('Security::htmlentities'),

  /**
   * Whether to automatically filter view data
   */
  'auto_filter_output'  => true,

  /**
   * Flags to use when encoding html entities
   */
   'html_entities_flags' => 'ENT_QUOTES',

  /**
   * Whether or not html entities should be double encoded
   */
   'html_entities_double_encode' => false,

  /**
   * When true, all variables passed on to view objects are automatically encoded
   */
   'auto_encode_view_data' => true,

  /**
   * With output encoding switched on all objects passed will be converted to strings or
   * throw exceptions unless they are instances of the classes in this array.
   */
  'whitelisted_classes' => array(
   'Fuel\\Core\\Response',
   'Fuel\\Core\\View',
   'Fuel\\Core\\ViewModel',
   'Closure',
  )