Symfony: iterate through json object to array

Question

How can I iterate through each Json object parameters?

I receive Json object as input. How can I either to convert this object to array or iterate through each parameter?

Example:

 {
  "firstName": "Jane",
  "lastName": "Dow",
  "aboutMe": "Web developer"
 }

In controller is it possible to do something like:

//$requestData - decoded json content
foreach ($requestData->data as $param){
        //do smth with each param
}

In controller I am not able to decode json file to array, because I receive Json object as an input already.

you want to iterate over attribute? So firstname is the first eleement of the array, lastname the second etc? — Matteo
– Matteo, Commented Aug 11, 2016 at 8:32
Casting it to an array might work, like $array = (array) $requestData->data;. — qooplmao
– qooplmao, Commented Aug 11, 2016 at 8:37

Alok Patel · Accepted Answer · 2016-08-11 08:38:11Z

4

You can use json_decode() to decode the JSON String to array or object. Like this,

$json_string="{  "firstName": "Jane",  "lastName": "Dow",  "aboutMe": "Web developer" }";
$json_array=json_decode($json_string,true);

$json_array will be an array and you can iterate over it just like normally you do in PHP Array.

json_decode() accepts second parameter as boolean, which is false by default. If it is true json_decode() return an array otherwise it returns object.

Reference: http://php.net/manual/en/function.json-decode.php

You can iterate over PHP Object like this,

foreach ($requestData as $key => $value) {
    echo $key." =>";
    var_dump($value);
}

edited Aug 11, 2016 at 8:38

answered Aug 11, 2016 at 8:30

Alok Patel

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4 Comments

blahblah Over a year ago

That's the trick, I am not receiving Json file as an input, I am receiving decoded Json object. So I can't decode file to array

Alok Patel Over a year ago

Do you have JSON string in the variable ?

blahblah Over a year ago

No, only json object. Is it ok to encode it back to json string and decode it to array?

Alok Patel Over a year ago

If it's a JSON object you can directly iterate over it like an array. See my updated answer.

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