Slim PHP and GET Parameters

I'm playing with Slim PHP as a framework for a RESTful API, and so far it's great. Super easy to work with, but I do have one question I can't find the answer to. How do I grab GET params from the URL in Slim PHP?

For example, if I wanted to use the following:

http://api.example.com/dataset/schools?zip=99999&radius=5

A case of the Mondays? Am I overthinking it? Thanks in advance!

You can do this very easily within the Slim framework, you can use:

$paramValue = $app->request()->params('paramName');

$app here is a Slim instance.

Or if you want to be more specific

//GET parameter

$paramValue = $app->request()->get('paramName');

//POST parameter

$paramValue = $app->request()->post('paramName');

You would use it like so in a specific route

$app->get('/route',  function () use ($app) {
          $paramValue = $app->request()->params('paramName');
});

You can read the documentation on the request object http://docs.slimframework.com/request/variables/

As of Slim v3:

$app->get('/route', function ($request, $response, $args) {
    $paramValue = $request->params(''); // equal to $_REQUEST
    $paramValue = $request->post(''); // equal to $_POST
    $paramValue = $request->get(''); // equal to $_GET

    // ...

    return $response;
});

For Slim 3/4 you need to use the method getQueryParams() on the PSR 7 Request object.

Citing Slim 3 / Slim 4 documentation:

> You can get the query parameters as an associative array on the > Request object using getQueryParams().

I fixed my api to receive a json body OR url parameter like this.

$data = json_decode($request->getBody()) ?: $request->params();

This might not suit everyone but it worked for me.

Slim 3

$request->getQueryParam('page')

or

$app->request->getQueryParam('page')

IF YOU WANT TO GET PARAMS WITH PARAM NAME

$value = $app->request->params('key');

The params() method will first search PUT variables, then POST variables, then GET variables. If no variables are found, null is returned. If you only want to search for a specific type of variable, you can use these methods instead:

//--- GET variable

$paramValue = $app->request->get('paramName');

//--- POST variable

$paramValue = $app->request->post('paramName');

//--- PUT variable

$paramValue = $app->request->put('paramName');

IF YOU WANT TO GET ALL PARAMETERS FROM REQUEST WITHOUT SPECIFYING PARAM NAME, YOU CAN GET ALL OF THEM INTO ARRAY IN FORMAT KEY => VALUE

$data = json_decode( $app->request->getBody() ) ?: $app->request->params();

$data will be an array that contains all fields from request as below

$data = array(
    'key' => 'value',
    'key' => 'value',
    //...
);

Hope it helps you!

Use $id = $request->getAttribute('id'); //where id is the name of the param

In Slim 3.0 the following also works:

routes.php

require_once 'user.php';

$app->get('/user/create', '\UserController:create');

user.php

class UserController
{
    public function create($request, $response, array $args)
    {
        $username = $request->getParam('username'));
        $password = $request->getParam('password'));
        // ...
    }
}

Not sure much about Slim PHP, but if you want to access the parameters from a URL then you should use the:

$_SERVER['QUERY_STRING']

You'll find a bunch of blog posts on Google to solve this. You can also use the PHP function parse_url.

Probably obvious to most, but just in case, building on vip's answer concerning Slim 3, you can use something like the following to get the values for the parameters.

        $logger = $this->getService('logger');
        $params = $request->getQueryParams();
        if ($params)  {
            foreach ($params as $key => $param)     {
                if (is_array($param))   {
                    foreach ($param as $value)  {
                        $logger->info("param[" . $key . "] = " . $value);
                    }
                }
                else    {
                    $logger->info("param[" . $key . "] = " . $param);
                }
            }
        }