# Php parameter passing **URL:** \ **Category:** Get Help\ **Created:** [April 19, 2020, 5:28pm UTC](https://community.auth0.com/t/php-parameter-passing/41367 "2020-04-19T17:28:41Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![edwardsmarkff](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/edwardsmarkff/32/12776_2.png) [@edwardsmarkff](https://community.auth0.com/u/edwardsmarkff)\ **Post date:** [April 19, 2020, 5:28pm UTC](https://community.auth0.com/t/php-parameter-passing/41367/1 "2020-04-19T17:28:41Z")
hello - maybe this is commonplace, but i never saw this documented anywhere. it appears that we are indeed allowed to include parameters in our `redirect_uri` value. i had expected a nasty message about how the `redirect_uri` does not match or something like that. in other words, in my `redirect_uri` i am able to append something like `?myValue=auth0Rocks` and it comes through just fine upon successful login this is very good news! i am almost surprised this works, but very glad it does.😁😁 my question: is this the best way to pass a parameter? ---
**Author:** ![dan.woda](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/dan.woda/32/18340_2.png) [@dan.woda](https://community.auth0.com/u/dan.woda)\ **Post date:** [April 21, 2020, 9:14pm UTC](https://community.auth0.com/t/php-parameter-passing/41367/3 "2020-04-21T21:14:43Z")
Hi @edwardsmarkff, We advise using a state parameter to look up and restore the previous state of the application. > **[Redirect Users](https://auth0.com/docs/authenticate/login/redirect-users-after-login)** > > Describes how to redirect users to URLs that have not been added to the AllowList. Does that make sense? Dan ---
**Author:** ![edwardsmarkff](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/edwardsmarkff/32/12776_2.png) [@edwardsmarkff](https://community.auth0.com/u/edwardsmarkff)\ **Post date:** [April 23, 2020, 10:17pm UTC](https://community.auth0.com/t/php-parameter-passing/41367/4 "2020-04-23T22:17:48Z")
this did not work: ``` $auth0 = new Auth0( [ 'domain' => constant('Auth0_domain') , 'client_id' => constant('Auth0_client_id') , 'client_secret' => constant('Auth0_client_secret') , 'redirect_uri' => constant('redirectUrl') //. '?one=twooo' , 'scope' => 'openid profile email name nickname picture' , 'state' => ['oneee' => 'twooooooo'] ] ); ``` and i am not sure how to create a `nonce` using php. i would like to pay somebody to put a working PHP example together for me of parameter passing, and then have auth0 include the example in their documentation. parameter passing would be very useful. ---
**Author:** ![dan.woda](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/dan.woda/32/18340_2.png) [@dan.woda](https://community.auth0.com/u/dan.woda)\ **Post date:** [April 24, 2020, 8:20pm UTC](https://community.auth0.com/t/php-parameter-passing/41367/5 "2020-04-24T20:20:44Z")
Hi @edwardsmarkff, Here is our partners page, it lists our partners network where you can find Auth0 contractors. > **[Partners - Auth0](https://auth0.com/partners)** > > Grow your business in an increasingly developer-centric world of apps. To help with your question, the nonce is basically just a random number, you send it as the state param in your auth request, and when it is returned you can pick up with that user where you left off. ---
**Author:** ![ashu4code](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/ashu4code/32/20850_2.png) [@ashu4code](https://community.auth0.com/u/ashu4code)\ **Post date:** [May 8, 2020, 3:56pm UTC](https://community.auth0.com/t/php-parameter-passing/41367/6 "2020-05-08T15:56:08Z")
```auto autth0( [ 'domain' => constant('Auth0_domain') , 'client_id' => constant('Auth0_client_id') , 'client_secret' => constant('Auth0_client_secret') , 'redirect_uri' => constant('redirectUrl') //. No param pass here , 'scope' => 'openid profile email name nickname picture' ] $state = "myValue=auth0Rocks " $auth0->login($state,null,$additionalParams); after successfull login . $state = !empty($_GET["state"]) ? $_GET["state"] : null; from url this $state = "myValue=auth0Rocks " ``` ---
**Author:** ![edwardsmarkff](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/edwardsmarkff/32/12776_2.png) [@edwardsmarkff](https://community.auth0.com/u/edwardsmarkff)\ **Post date:** [May 8, 2020, 4:31pm UTC](https://community.auth0.com/t/php-parameter-passing/41367/7 "2020-05-08T16:31:24Z")
> [@dan.woda](#): > > We advise using a state parameter to look up and restore the previous state of the application. dan - ashu4code is the contractor i hired to figure this out for me. would it be possible to have this example included in the documentation? i am sure this is easy for most PHP people, but i do not work with PHP very often, so it was very difficult for me. ---
**Author:** ![dan.woda](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/dan.woda/32/18340_2.png) [@dan.woda](https://community.auth0.com/u/dan.woda)\ **Post date:** [May 8, 2020, 10:10pm UTC](https://community.auth0.com/t/php-parameter-passing/41367/8 "2020-05-08T22:10:59Z")
Thanks for sharing! We really appreciate it. I will pass the recommendation on to the team. For now, I will mark it as the solution in this thread. Community threads like this often act as a guide for users in similar situations. Thanks! ---
**Author:** ![edwardsmarkff](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/edwardsmarkff/32/12776_2.png) [@edwardsmarkff](https://community.auth0.com/u/edwardsmarkff)\ **Post date:** [May 13, 2020, 1:03am UTC](https://community.auth0.com/t/php-parameter-passing/41367/9 "2020-05-13T01:03:00Z")
here is the working example. note that this REALLY needs to be included in a PHP cookbook recipe. note its really pretty simple, but i have not worked with PHP enough recently to have figured this out quickly: ```auto 'One' , 'Parm2' => 'Two' , 'ServerTime' => date('Y-m-d H:i:s') ]; $state = !empty($_GET["state"]) ? $_GET["state"] : null; // ?? required?? $code = !empty($_GET["code"]) ? $_GET["code"] : null; require 'vendor/autoload.php'; use Auth0\SDK\Auth0; define('redirectUrl' , ( $_SERVER['HTTPS'] ? 'https' : 'http' ) . '://' . $_SERVER['HTTP_HOST'] . $_SERVER['SCRIPT_NAME'] ); $auth0 = new Auth0([ 'domain' => 'dev-2a5XXX8.auth0.com', 'client_id' => 'kZvXXXXXXXC', 'client_secret' => '4pXXXXW0', 'redirect_uri' => constant('redirectUrl'), 'scope' => 'openid profile email', ]); $userInfo = null; try { $userInfo = $auth0->getUser(); } catch (Exception $e) { $auth0->logout(); error_log( 'Line: ' . __LINE__. ' -- Caught Auth0 exception: ' . $e->getMessage() . ' -- exiting program.' . "\n" ); header('Location: ?logout=1' ) ; exit; } if (!$userInfo) { // We have no user info // pass the param in $state variable $state = http_build_query($parmArray); $auth0->login($state, null, []); exit; } else { // User is authenticated $userInfo = $auth0->getUser(); printf( 'Hello %s!', htmlspecialchars( $userInfo['name'] ) ); // display the parameters $get_string = $state; echo '
Result:
'; parse_str($get_string, $get_array); echo $get_string; echo '
'; print_r($get_array); echo '
'; phpinfo(); // or just look here for the parameters } ``` ---
**Author:** ![dan.woda](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/dan.woda/32/18340_2.png) [@dan.woda](https://community.auth0.com/u/dan.woda)\ **Post date:** [May 14, 2020, 4:20pm UTC](https://community.auth0.com/t/php-parameter-passing/41367/10 "2020-05-14T16:20:01Z")
Thanks for sharing this @edwardsmarkff. ---
**Author:** ![dan.woda](https://sea1.discourse-cdn.com/auth0/user_avatar/community.auth0.com/dan.woda/32/18340_2.png) [@dan.woda](https://community.auth0.com/u/dan.woda)\ **Post date:** [May 29, 2020, 4:20pm UTC](https://community.auth0.com/t/php-parameter-passing/41367/11 "2020-05-29T16:20:04Z")
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