How to loop through json data php

Question

I'm trying to loop through JSON data in php.

array:2 [
  "cart" => array:3 [
    0 => array:4 [
      "id" => 3
      "name" => "ying"
      "price" => "4000"
    ]
    1 => array:4 [
      "id" => 2
      "name" => "yang"
      "price" => "4000"
    ]
    2 => array:4 [
      "id" => 4
      "name" => "foo"
      "price" => "5000"
    ]
  ]
  "total" => 13000
]

I've used the json_decode function and a foreach over the data.

foreach (json_decode($arr) as $item) {
    $item['name'];
}

I want to be able to get each "cart" item and the single "total" data but I keep getting an illegal offset error when i try to call things like $item['name']

It's an array within an array. You are not accounting for that. — John Conde
– John Conde, Commented Sep 10, 2019 at 11:56

Rahul · Accepted Answer · 2019-09-10 12:30:35Z

0

As written in json_decode doc:

Note: When TRUE, returned objects will be converted into associative arrays.

If you dont pass 2nd argument as true then it will be treated as object as below.

$arr = json_decode($arr);
$names = [];
foreach ($arr->cart as $item) {
    $names[] = $item->name;
}
echo $arr->total;// this is how you will get total.

If you pass 2nd argument as true then it will be treated as associative array as below.

$names  = [];
$arr = json_decode($arr, true);
foreach ($arr['cart'] as $item) {
    $names[] = $item['name'];
}
echo $arr['total'];// this is how you will get total.

In your code, your data is having two main keys viz. cart and total. From which, you are trying to fetch the data of cart which I specified in my answer.

edited Sep 10, 2019 at 12:30

answered Sep 10, 2019 at 12:07

Rahul

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6 Comments

LDUBBS Over a year ago

This works but it returns data from the first array only and i can't access 'total'

John Conde Over a year ago

You should point out that the data need is in the cart array and not the root of the decoded array. Your answer is correct but just lacks a complete explanation.

LDUBBS Over a year ago

Right John, i need to be able to get 'cart' data and total.

Rahul Over a year ago

I made changes in my answer. Please have a look.

LDUBBS Over a year ago

Thanks Rahul but i'm trying to fetch data for 'cart' and 'total'

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