Reading JSON data in PHP

Question

I have a JSON object like below, which is stored in a variable called $product.

{"id":30}

When I try to access the stored value though, I get the following error:

Trying to get property of non-object

Here is what I am doing:

echo $product->id;

Alright folks, sorry for the wild goose chase. Apparently $products was an array and not a JSON data, which is really odd because print_r($products) and echo $products gave different results.

The results can be viewed here:

I am using Laravel, and usually laravel returns a nice JSON object from an SQL query, I must have changed something somewhere, which is why this happened. Thanks.

Do you test json_decode() after calling json_encode() -- $obj = json_decode(json_encode($product)); echo $obj->id; — Junyoung LEE
– Junyoung LEE, Commented Sep 30, 2014 at 8:45

Bhumi Shah · Accepted Answer · 2014-09-30 05:55:04Z

1

Try following json_decode function

$product = '{"id":30}'; $t = json_decode($product); echo $t->id;exit;

answered Sep 30, 2014 at 5:55

Bhumi Shah

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2 Comments

sarovarc Over a year ago

Doesn't work, gives me an error "Object of class stdClass could not be converted to string"

sarovarc Over a year ago

If I try json_decode($product, true); then I get the following error "Array to string conversion"

Adam Sinclair · Accepted Answer · 2014-09-30 06:00:03Z

0

You could use json_decode to your object.

Takes a JSON encoded string and converts it into a PHP variable.

usage:

print_r(json_decode($obj, true)); var_dump(json_decode($obj));

edited Sep 30, 2014 at 6:00

answered Sep 30, 2014 at 5:54

Adam Sinclair

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8 Comments

Adam Sinclair Over a year ago

@sarovarc try this print_r(json_decode($product, true));

sarovarc Over a year ago

Give the following error Array to string conversion

Adam Sinclair Over a year ago

@sarovarc try print_r($product);

sarovarc Over a year ago

Ok there's definitely something odd going on:

Adam Sinclair Over a year ago

@sarovarc that is what I thought glad it helped ;)

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Junyoung LEE · Accepted Answer · 2014-09-30 06:07:08Z

Trying below sample :

<?php $product = '{"id": 30}'; $obj = json_decode(json_encode($product)); // or json_decode(json_encode($product), true); echo $obj->{'id'}; // or echo $obj->id ?>

Mathias Jørgensen · Accepted Answer · 2014-09-30 06:13:53Z

The first examples are working for me, make sure you PHP is supporting the json_decode() function. Or you could try this:

$product = '{"id":30}'; $t = json_decode($product, true); echo $t["id"];

Passing the true value converts it to an array instead.

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