SimpleSAML_Configuration::hasValue PHP Method

    public function hasValue($name)
    {
        return array_key_exists($name, $this->configuration);
    }

 /**
  * @param SimpleSAML_Configuration $configuration
  * @param string                   $prefix
  *
  * @return array
  */
 private static function pluckConfiguration(SimpleSAML_Configuration $configuration, $prefix = '')
 {
     $extracted = array();
     // ported from
     // https://github.com/simplesamlphp/simplesamlphp/blob/3d735912342767d391297cc5e13272a76730aca0/lib/SimpleSAML/Configuration.php#L1092
     if ($configuration->hasValue($prefix . 'keys')) {
         $extracted['keys'] = $configuration->getArray($prefix . 'keys');
     }
     // ported from
     // https://github.com/simplesamlphp/simplesamlphp/blob/3d735912342767d391297cc5e13272a76730aca0/lib/SimpleSAML/Configuration.php#L1108
     if ($configuration->hasValue($prefix . 'certData')) {
         $extracted['certificateData'] = $configuration->getString($prefix . 'certData');
     }
     // ported from
     // https://github.com/simplesamlphp/simplesamlphp/blob/3d735912342767d391297cc5e13272a76730aca0/lib/SimpleSAML/Configuration.php#L1119
     if ($configuration->hasValue($prefix . 'certificate')) {
         $extracted['certificateData'] = $configuration->getString($prefix . 'certificate');
     }
     // ported from
     // https://github.com/simplesamlphp/simplesamlphp/blob/3d735912342767d391297cc5e13272a76730aca0/modules/saml/lib/Message.php#L161
     if ($configuration->hasValue($prefix . 'certFingerprint')) {
         $extracted['certificateFingerprint'] = $configuration->getArrayizeString('certFingerprint');
     }
     $extracted['assertionEncryptionEnabled'] = $configuration->getBoolean('assertion.encryption', FALSE);
     if ($configuration->has('sharedKey')) {
         $extracted['sharedKey'] = $configuration->getString('sharedKey');
     }
     return $extracted;
 }