public function index2()
{
    $consumerKey = 'kfkhypveth1upv6f4uwy5l9r7tdwmdp0';
    $consumerSecret = 't9ire4rup8wre5gbbqt3ic2q2snb6ogs';
    $accessToken = '9alfh5bntatd0gk3lwdjxv972erppnmk';
    $accessTokenSecret = 'rxmvwjrb9r8qq2hy0e2ijdytk2srrhmc';
    $method = 'GET';
    $status_field     = "searchCriteria[filterGroups][0][filters][0][field]=status";
    $status_value     =  "searchCriteria[filterGroups][0][filters][0][value]=pending";//
    $status_condition = "searchCriteria[filterGroups][0][filters][0][condition_type]=eq";
    $sc = $status_field . '&' . $status_value . '&' . $status_condition;

    $url = "http://127.0.0.1:8080/mg1/index.php/rest/V1/orders/?".$sc;

    $data = [
            'oauth_consumer_key' => $consumerKey,
            'oauth_nonce' => md5(uniqid(rand(), true)),
            'oauth_signature_method' => 'HMAC-SHA1',
            'oauth_timestamp' => time(),
            'oauth_token' => $accessToken,
            'oauth_version' => '1.0',
    ];

    $data['oauth_signature'] = $this->sign($method, $url, $data, $consumerSecret, $accessTokenSecret);
    $curl = curl_init();
    curl_setopt_array($curl, [
            CURLOPT_RETURNTRANSFER => 1,
            CURLOPT_URL => $url,
            CURLOPT_HTTPHEADER => [
                    'Authorization: OAuth ' . http_build_query($data, '', ',')
            ]
    ]);

    $result = curl_exec($curl);
    curl_close($curl);
    echo '<pre>';
    print_r(json_decode($result,false));


 }//end of function

stdClass Object
(
[message] => Invalid signature
[trace] => #0 C:wamp64wwwmg1vendormagentoframeworkOauthOauth.php(121): MagentoFrameworkOauthOauth->_validateSignature(Array, 't9ire4rup8wre5g...', 'GET', 'http://127.0.0....', 'rxmvwjrb9r8qq2h...')
#1 C:wamp64wwwmg1vendormagentomodule-webapiModelAuthorizationOauthUserContext.php(82): MagentoFrameworkOauthOauth->validateAccessTokenRequest(Array, 'http://127.0.0....', 'GET')
#2 C:wamp64wwwmg1vendormagentomodule-authorizationModelCompositeUserContext.php(78): MagentoWebapiModelAuthorizationOauthUserContext->getUserId()
#3 C:wamp64wwwmg1vendormagentomodule-authorizationModelCompositeUserContext.php(57): MagentoAuthorizationModelCompositeUserContext->getUserContext()
#4 C:wamp64wwwmg1vendormagentomodule-webapiModelWebapiRoleLocator.php(45): MagentoAuthorizationModelCompositeUserContext->getUserId()
#5 C:wamp64wwwmg1vendormagentoframeworkAuthorization.php(47): MagentoWebapiModelWebapiRoleLocator->getAclRoleId()
#6 C:wamp64wwwmg1vendormagentoframeworkInterceptionInterceptor.php(74): MagentoFrameworkAuthorization->isAllowed('Magento_Sales::...', NULL)
#7 C:wamp64wwwmg1vendormagentoframeworkInterceptionChainChain.php(70): MagentoFrameworkAuthorizationInterceptor->___callParent('isAllowed', Array)
#8 C:wamp64wwwmg1vendormagentoframeworkInterceptionChainChain.php(63): MagentoFrameworkInterceptionChainChain->invokeNext('Magento\Framewo...', 'isAllowed', Object(MagentoFrameworkAuthorizationInterceptor), Array, 'customerAuthori...')
#9 C:wamp64wwwmg1vendormagentomodule-customerModelPluginCustomerAuthorization.php(58): MagentoFrameworkInterceptionChainChain->MagentoFrameworkInterceptionChain{closure}('Magento_Sales::...', NULL)
 #10 C:wamp64wwwmg1vendormagentoframeworkInterceptionChainChain.php(67): MagentoCustomerModelPluginCustomerAuthorization->aroundIsAllowed(Object(MagentoFrameworkAuthorizationInterceptor), Object(Closure), 'Magento_Sales::...', NULL)
#11 C:wamp64wwwmg1vendormagentoframeworkInterceptionInterceptor.php(138): MagentoFrameworkInterceptionChainChain->invokeNext('Magento\Framewo...', 'isAllowed', Object(MagentoFrameworkAuthorizationInterceptor), Array, 'guestAuthorizat...')
#12 C:wamp64wwwmg1vendormagentomodule-webapiModelPluginGuestAuthorization.php(38): MagentoFrameworkAuthorizationInterceptor->MagentoFrameworkInterception{closure}('Magento_Sales::...', NULL)
#13 C:wamp64wwwmg1vendormagentoframeworkInterceptionInterceptor.php(142): MagentoWebapiModelPluginGuestAuthorization->aroundIsAllowed(Object(MagentoFrameworkAuthorizationInterceptor), Object(Closure), 'Magento_Sales::...')
#14 C:wamp64wwwmg1vargenerationMagentoFrameworkAuthorizationInterceptor.php(26): MagentoFrameworkAuthorizationInterceptor->___callPlugins('isAllowed', Array, Array)
#15 C:wamp64wwwmg1vendormagentoframeworkWebapiAuthorization.php(37): MagentoFrameworkAuthorizationInterceptor->isAllowed('Magento_Sales::...')
#16 C:wamp64wwwmg1vendormagentomodule-webapiControllerRestRequestValidator.php(86): MagentoFrameworkWebapiAuthorization->isAllowed(Array)
#17 C:wamp64wwwmg1vendormagentomodule-webapiControllerRestRequestValidator.php(70): MagentoWebapiControllerRestRequestValidator->checkPermissions()
#18 C:wamp64wwwmg1vendormagentomodule-webapiControllerRestInputParamsResolver.php(80): MagentoWebapiControllerRestRequestValidator->validate()
#19 C:wamp64wwwmg1vendormagentomodule-webapiControllerRest.php(299): MagentoWebapiControllerRestInputParamsResolver->resolve()
#20 C:wamp64wwwmg1vendormagentomodule-webapiControllerRest.php(216): MagentoWebapiControllerRest->processApiRequest()
#21 C:wamp64wwwmg1vargenerationMagentoWebapiControllerRestInterceptor.php(37): MagentoWebapiControllerRest->dispatch(Object(MagentoFrameworkAppRequestHttp))
#22 C:wamp64wwwmg1vendormagentoframeworkAppHttp.php(135): MagentoWebapiControllerRestInterceptor->dispatch(Object(MagentoFrameworkAppRequestHttp))
 #23 C:wamp64wwwmg1vendormagentoframeworkAppBootstrap.php(258): MagentoFrameworkAppHttp->launch()
 #24 C:wamp64wwwmg1index.php(39): MagentoFrameworkAppBootstrap-    >run(Object(MagentoFrameworkAppHttp))
#25 {main}

$url = "http://127.0.0.1:8080/mg1/index.php/rest/V1/orders/1";