Slim JSON Outputs
Solution 1
header("Content-Type: application/json");
echo json_encode($result);
exit;
Hint: Using The Slim PHP Framework for Developing REST APIs
Solution 2
Why not just use Slim's Response Object? (also... why exit?)
$dataAry = // Some data array
$response = $app->response();
$response['Content-Type'] = 'application/json';
$response['X-Powered-By'] = 'Potato Energy';
$response->status(200);
// etc.
$response->body(json_encode($dataAry));
// Or echo json_encode($dataAry)
Let me preface by saying I still consider myself a noob so if I'm making errors please correct me so I can learn. But, I was playing with a similar problem/question and I thought I might chime in with 2 cents and archive a little more discussion on the matter. The more information there is about Slim on Stack the better.
I was basically toying with the same thing and I noticed that you were using exit; At first, I was using exit also because echo was including a bunch of HTML and mucking up what was being returned to my AJAX call. When I used exit, it cleanly cut the HTML out but then the Slim response object wasn't changing the response headers as I defined (see above code.)
What I realized was that this isn't how Slim was designed to work. Use echo, not exit. NOTE - Slim Doc:
Whenever you echo() content from within a route callback, the echo()’d content is captured >in an output buffer and later appended to the Response body before the HTTP response is >returned to the client.
That's convenient, but I was not able to echo. What I was messing up on was a bigger problem. Separation of content from behavior. If you're like me, you're setting up a single page application where this code basically sits on index.php. There is initial html that I needed to load up so I included it on that page. What I needed to do was create a cleaner separation. My routing was properly set up and so when people GET '/' the Slim_Views (see Develop Rel.) returns a rendered template of html and js for me. Brilliant!
Now I have all of Slim's tools at disposal and my code is much much cleaner, separate, manageable, and more compliant with http protocols. I guess this is what frameworks are for. :-)
NOTE: I'm not saying all this is what went down on your end, but I thought the question and your setup seemed very similar. It might help another new guy who wanders down this same path.
UPDATE: As @alttag mentions, this answer is getting out of date (Slim 2)
For Slim3, see an answer below or see this page in the documentation
Solution 3
Using Slim 3, I'm using this format:
<?php
$app = new \Slim\App();
$app->get('/{id}', function ($request, $response, $args) {
$id = $request->getAttribute('id');
return $response->withJSON(
['id' => $id],
200,
JSON_UNESCAPED_UNICODE
);
});
On request "/123", result JSON with:
{
id: "123"
}
More infos read here.
[UPDATE]
Added second and third param to withJSON
. Second is The HTTP status code, and third is Json encoding options (best for especial chars and others, for example: print "ã" correctly)
Solution 4
you can extend slim with an output function which output is depending the REST request was called:
class mySlim extends Slim\Slim {
function outputArray($data) {
switch($this->request->headers->get('Accept')) {
case 'application/json':
default:
$this->response->headers->set('Content-Type', 'application/json');
echo json_encode($data);
}
}
}
$app = new mySlim();
and use it like this:
$app->get('/test/', function() use ($app) {
$data = array(1,2,3,4);
$app->outputArray($data);
});
Solution 5
Since everyone has complicated their answers with functions and classes, I'll throw in this simplified answer. The \Slim\Http\Response can do it for you like this:
$app = new \Slim\Slim();
$app->get('/something', function () use ($app) {
$response = $app->response();
$response['Content-Type'] = 'application/json';
$response->status(200);
$response->body(json_encode(['data' => []]));
});
$app->run();
As you're most likely only returning JSON data it might be a good idea to make an appropriate middleware, see http://www.sitepoint.com/best-practices-rest-api-scratch-introduction/.
Comments
-
max_ over 3 years
I am using the Slim framework with PHP to create a RESTful API for my app. However, I assumed that the framework would have some way of creating easier JSON outputs rather than just
exit($jsonEncodedVariable);
.Am I missing something in the framework, or do I need to use
json_encode()
...exit($json)
... for every method?All of the data is taken out of the my MySQL database and would then be put into a JSON array depending on what REST request was called.
For example, if
/api/posts/all
was requested, I wouldexit()
a JSON array of all the posts which each value for its own key,"value" : key
.My question is, is there an easy way, using the slim framework, for
exit()
'ing JSON code instead of exiting it as plain text?