PHP Get JSON Values Issue

Question

I'm receiving some JSON POST data from a Webhook into my server. I can get the JSON data as follows:

$orderJSON = file_get_contents('php://input');

which returns this JSON:

{
  "order": {
"billing_address": {
  "address_1": "76 Pacific Drive", 
  "address_2": "", 
  "city": "Bondi", 
  "company": "Hanson Media", 
  "country": "AU", 
  "email": "testing@gmail.com", 
  "first_name": "Hansel", 
  "last_name": "Gretten", 
  "phone": "212 554 7855", 
  "postcode": "2026", 
  "state": "NSW"
}, 
"cart_tax": "3.60", 
"completed_at": "2016-12-19T11:07:15Z", 
"coupon_lines": [], 
"created_at": "2016-12-19T11:07:15Z", 
"currency": "AUD", 
"customer": {
  "billing_address": {
    "address_1": "76 Pacific Drive", 
    "address_2": "", 
    "city": "Bondi", 
    "company": "Hanson Media", 
    "country": "AU", 
    "email": "testing@gmail.com", 
    "first_name": "Hansel", 
    "last_name": "Gretten", 
    "phone": "212 554 7855", 
    "postcode": "2026", 
    "state": "NSW"
  }, 
  "email": "testing@gmail.com", 
  "first_name": "Hansel", 
  "id": 0, 
  "last_name": "Gretten", 
  "shipping_address": {
    "address_1": "76 Pacific Drive", 
    "address_2": "", 
    "city": "Bondi", 
    "company": "Hanson Media", 
    "country": "AU", 
    "first_name": "Hansel", 
    "last_name": "Gretten", 
    "postcode": "2026", 
    "state": "NSW"
  }
}, 
"fee_lines": [], 
"id": 3304, 
"is_vat_exempt": false, 
"line_items": [
  {
    "id": 113, 
    "meta": [], 
    "name": "Happy Ninja", 
    "price": "18.00", 
    "product_id": 37, 
    "quantity": 2, 
    "sku": "", 
    "subtotal": "36.00", 
    "subtotal_tax": "3.60", 
    "tax_class": null, 
    "total": "36.00", 
    "total_tax": "3.60"
  }, 
  {
    "id": 114, 
    "meta": [], 
    "name": "Water Bottles", 
    "price": "20.50", 
    "product_id": 3291, 
    "quantity": 1, 
    "sku": "PD885536", 
    "subtotal": "20.50", 
    "subtotal_tax": "0.00", 
    "tax_class": "standard", 
    "total": "20.50", 
    "total_tax": "0.00"
  }
], 
"note": "Call to arrange delivery time", 
"order_key": "wc_order_5857bf639d951", 
"order_number": 3304, 
"payment_details": {
  "method_id": "eway", 
  "method_title": "Credit Card", 
  "paid": false
}, 
"shipping_address": {
  "address_1": "76 Pacific Drive", 
  "address_2": "", 
  "city": "Bondi", 
  "company": "Hanson Media", 
  "country": "AU", 
  "first_name": "Hansel", 
  "last_name": "Gretten", 
  "postcode": "2026", 
  "state": "NSW"
}, 
"shipping_lines": [
  {
    "id": 115, 
    "method_id": "local_pickup:1", 
    "method_title": "Local Pickup", 
    "total": "0.00"
  }
], 
"shipping_methods": "Local Pickup", 
"shipping_tax": "0.00", 
"status": "pending", 
"subtotal": "56.50", 
"tax_lines": [
  {
    "code": "AU-GST-1", 
    "compound": false, 
    "id": 116, 
    "rate_id": "1", 
    "title": "GST", 
    "total": "3.60"
  }
], 
"total": "60.10", 
"total_discount": "0.00", 
"total_line_items_quantity": 3, 
"total_shipping": "0.00", 
"total_tax": "3.60", 
"updated_at": "2016-12-19T11:07:15Z", 
"view_order_url": "https://mywebsite.com/my-account/view-order/3304"
  }
}

I now need to get individual elements from the JSON, e.g. I would like to get the id value (3304). I've tried:

$orderID = $orderJSON->id;

and

 $orderID = $orderJSON[id];

but this just generates errors like 'Trying to get property of non-object'.

Muhammad Hassaan · Answer 1 · 2016-12-19T11:55:04.610

0

You need to use json_decode() first as I can't see this in your question.
id is under order parent so you need to do sonething like $orderJSON->order->id
You must also check decoded $orderJSON is not empty

Example

$orderJSON = json_decode($orderJSON);
if (empty($orderJSON)) {
    throw new RuntimeException('Malformed json');
}
$orderID = $orderJSON->order->id;

edited Dec 19 '16 at 11:55

answered Dec 19 '16 at 11:27

Muhammad Hassaan

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`json_decode` returns `null` when the argument is malformed. It is advisable to check if `$orderJSON` is not empty, otherwise it would be the same 'Trying to get property of non-object'. – Alex Blex Dec 19 '16 at 11:40
@AlexBlex thanks. I have updated my answer – Muhammad Hassaan Dec 19 '16 at 11:45
Sorry man, it is other way round. It's actually a good example why reusing variable name is not the best practice. Hope you don't mind I edited your answer. – Alex Blex Dec 19 '16 at 11:52
@AlexBlex sure no problem. – Muhammad Hassaan Dec 19 '16 at 11:55
The ``empty()`` function is not what guarantee you get a well formed JSON file. It's the ``json_last_error()``. – Amin NAIRI Dec 19 '16 at 11:56
@Gradiuss It is sufficient to guarantee the result is an object. – Alex Blex Dec 19 '16 at 12:14

score 0 · Accepted Answer · answered Dec 19 '16 at 12:08

Use the json_decode() function to translate your JSON file into a PHP readable data.

<?php
$json = json_decode($orderJSON);

Once you get your JSON file decoded, you can use the function print_r() to print a nice representation of your datas.

<?php
print_r($orderJSON);

This can help you identify how the file is formed and thus determine all the dimensions you need to display the wanted value.

JSON to nice

Now, if you look closely, you'll see that in order to print your ID, you need to pass through the order dimension.

So you may want to use the syntax $json->order->id to target the wanted ID.

<?php
echo $json->order->id;

Display the ID from JSON

PHP : JSON.

PHP : print_r().

PHP Get JSON Values Issue

2 Answers2