Search item on json object PHP [duplicate] - php

Question

This question already has an answer here:
How to extract and access data from JSON with PHP?
(1 answer)
Closed 4 years ago.
I have this kind of json objects and im trying to search an item under sales->products->id but i can't make it work. I hope someone could help me. Thanks!
"sales": [
{
"ID": 123456,
"transaction_id": "123456789",
"key": "sdawa57sd547sad4sadx54ad",
"subtotal": 20,
"tax": "0",
"fees": null,
"total": "20",
"gateway": "paypal",
"email": "email#email.com",
"date": "2018-08-01 13:13:55",
"discounts": null,
"products": [
{
"id": 1234,
"quantity": 1,
"name": "Product 1",
"price": 20,
"price_name": ""
}
]
}
This is the code i used:
$content = file_get_contents($url);
$results= json_decode($content, TRUE);
foreach($results->sales as $item)
{
if($item->products->id == "1234")
{
echo $item->products->name;
}
}

Answer 1

Because you've passed the second parameter as true to json_decode, your $results variable is an array, so you need to access it like that:
foreach($results['sales'] as $item) {
foreach ($item['products'] as $product) {
if ($product['id'] == '1234') echo $product['name'];
}
}
Output:
Product 1
Demo on 3v4l.org

Answer 2

If you want to find which sales have the product, then you should do this
$results= json_decode($content);
$productid = "1234"; //product you want to search for
foreach($result->sales as $sale)
{
$keys = array_keys(array_column($sale->products, 'id'), $product_id);
if(!empty($keys))
$saleIDs[] = $sale->ID;
}
var_dump($saleIDs); //contains all the sale IDs that have the product
Read about array_keys and array_column.