How do I obtain all the GET parameters on Silex?

Question

I've been using Silex for a day, and I have the first "stupid" question. If I have:

$app->get('/cities/{city_id}.json', function(Request $request, $city_id) use($app) {
    ....
})
->bind('city')
->middleware($checkHash);

I want to get all the parameters (city_id) included in the middleware:

$checkHash = function (Request $request) use ($app) {

    // not loading city_id, just the parameter after the ?
    $params = $request->query->all();

    ....
}

So, how do I get city_id (both the parameter name and its value) inside the middleware. I'm going to have like 30 actions, so I need something usable and maintainable.

What am I missing?

thanks a lot!

Solution

We need to get those extra parameters of $request->attributes

$checkHash = function (Request $request) use ($app) {

    // GET params
    $params = $request->query->all();

    // Params which are on the PATH_INFO
    foreach ( $request->attributes as $key => $val )
    {
        // on the attributes ParamaterBag there are other parameters
        // which start with a _parametername. We don't want them.
        if ( strpos($key, '_') != 0 )
        {
            $params[ $key ] = $val;
        }
    }

    // now we have all the parameters of the url on $params

    ...

});

Solution

In Request object you have access to multiple parameter bags, in particular:

• $request->query - the GET parameters
• $request->request - the POST parameters
• $request->attributes - the request attributes (includes parameters parsed from the PATH_INFO)

$request->query contains GET parameters only. city_id is not a GET parameter. It's an attribute parsed from the PATH_INFO.

Silex uses several Symfony Components. Request and Response classes are part of the HttpFoundation. Learn more about it from Symfony docs:

• The HttpFoundation Component
• HttpFoundation API
• Request API