PHP json returning strings not numbers?

Question

PHP

$context = stream_context_create($options);
        $response = file_get_contents($url, false, $context);
        $response = json_decode($response, true);

The response comes from the API - from different
Numbers are floating point, but my script receives them as integers.
Should be 87.80
Comes 8780 - without a dot separating a penny.

Answer 1

const json = { float: 439000.0 }
JSON.stringify(json); // '{"float":439000}'

Need to explain?
UPD: I googled for you))

<?php

$test = [
    "price" => 4390.00
];

echo json_encode($test, JSON_PRESERVE_ZERO_FRACTION);