how to echo fixer.io json php - php

Question

Hi I'm trying get a json from fixer.io and then for each rates echo it but cant get it to work.
the code are
<?php
function usd(){
echo 'HEJ test';
$fixer_access_key = my_access_key;
$url= 'https://data.fixer.io/api/latest?access_key=' . $fixer_access_key;
echo $url;
$json = file_get_contents($url);
$data = json_decode($json);
echo $url . "<br>";
echo 'printing json foreach <br>';
foreach($data as $obj){
echo '...';
$prefix = $obj;
echo $prefix;
echo '<br>';}
echo 'done printing json foreach';
}
usd(); ?>
and the result are:
https://data.fixer.io/api/latest?access_key=my_fixer_key
printing json foreach
done printing json foreach

Answer 1

instead of
$data = json_decode($json);
use
$data = json_decode($json, true);
This should allow foreacha to works - however you will only see first level of json object keys (not nested ones). The second parameter of json_decode change result from object to array.
You will also need to change foreach - to following: foreach($data as $key => $obj) and inside it echo $obj to echo $key;.
Here is simplified working example.
ALTERNATIVE SOLUTION
If working foreach is not your goal but rather pretty printed json, then instead use following code:
$json_string = json_encode($data, JSON_PRETTY_PRINT);
echo $json_string;