Add value to route before in slim framework - php

Question

Hi Folks i upgrading my slim framework from slim 2 to slim 4 for older project
for one route i added the one value before route using slim 2 slim.before in index.php
example code:
$app->hook('slim.before', function () use ($app) {
$env = $app->environment();
$path = $env['PATH_INFO'];
// spliting the route and adding the dynamic value to the route
$uriArray = explode('/', $path);
$dynamicvalue = 'value';
if(array_key_exists($uriArray[1], array)) {
$dynamicvalue = $uriArray[1];
//we are trimming the api route
$path_trimmed = substr($path, strlen($dynamicvalue) + 1);
$env['PATH_INFO'] = $path_trimmed;
}
});
i read about the add beforemiddleware but cannot able find correct way to add it and i cannot able to find the replacement for $app->environment();
i want to append the dynamic value directly to route
for example
i have one route like this
https://api.fakedata.com/fakeid
by using the above route splitting code i appending the value route using slim.before in slim 2
for example take the dynamic value as test
the route will be
https://api.fakedata.com/test/fakeid
the response of the both api will be same we want to just add value to the route
can any one help me how to do with slim 4

Answer 1

I assume you need to and PATH_INFO to the environment so you can later refer to it in the route callback. You can add a middleware to add attributes to the $request the route callback receives:
use Psr\Http\Message\ServerRequestInterface as Request;
use Psr\Http\Server\RequestHandlerInterface as RequestHandler;
use Slim\Psr7\Response;
class PathInfoMiddleware {
public function __invoke(Request $request, RequestHandler $handler) : Response {
$info = 'some value, path_trimmed for example...'; // this could be whatever you need it to be
$request = $request->withAttribute('PATH_INFO', $info);
return $handler->handle($request);
}
}
// Add middleware to all routes
$app->add(PathInfoMiddleware::class);
// Use the attribute in a route
$app->get('/pathinfo', function(Request $request, Response $response){
$response->getBody()->write($request->getAttribute('PATH_INFO'));
return $response;
});
Now visiting /pathinfo gives the following output:
some value, path_trimmed for example...