Printing JSON formatted like Facebook does

Here the example: https://graph.facebook.com/19292868552

How is it possible? The source of the page is just as the page appears! There's no code of any kind. If you try to change the last 2 number in the url you can get other examples. How do they print this JSON with carriage return after every element of the array without any sort of <br/>?

In php.net I can't find any way to nicely print JSON like this.

 $vettore = array(
    "uno" => 1,
    "due" => 2,
    "tre" => 3
 );

 header("Content-Type: text/javascript; charset=UTF-8");
 echo json_encode($vettore, JS开发者_开发百科ON_PRETTY_PRINT);

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If you look at the reply headers, there's this line:

Content-Type: text/javascript; charset=UTF-8

By this the browser knows that the page is not HTML and doesn't try to format it as such.

---

Tell the browser that it's plain text, then just pretty print it.

header('Content-type: text/plain');

Although they actually use text/javascript, as shown by the page properties.

---

You could do it like this, it doesn't seem the best way to achieve neatly formatted Json but it does work.

$json_stuff = array(
   "url"         => "http://example.com",
   "name"        => "my name",
   "description" => "some description",
   "other"       => "some text"
);

foreach ($json_stuff as $key => $val) {
   $json_string .= "\"${key}\" : \"${val}\",\n";
}

header('Content-Type: application/json');
die("{\n".rtrim($json_string, ",\n")."\n}");

Above would output below with line breaks and without backslashs in urls.

{
"url" : "http://example.com",
"name" : "my name",
"description" : "some description",
"other" : "some text"
}