Request graphql with php - php

Question

I need to make a graphql query using pure php, is this possible and how to do it?
graphql request:
{
getLastLowestProductPrices(
lastLowestPricesInput: [{date: "2023-01-01", productId: 14397, sizeId: "uniw"}]
) {
id
sizes {
id
price {
gross {
value
currency
}
}
}
}
endpoint: https://trening-dev1.iai-shop.com/graphql/v1/?docLang=pl
Please help me
Edit:
my php code:
function do_post_request($url, $data)
{
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER,
array(
'Content-Type: application/json',
'Content-Length: ' . strlen($data)
)
);
return curl_exec($ch);
}
function get($endpoint)
{
$json = '{
getLastLowestProductPrices(
lastLowestPricesInput: [{date: "2023-01-01", productId: 14397, sizeId: "uniw"}]
) {
id
sizes {
id
price {
gross {
value
currency
}
}
}
}';
$result = do_post_request($endpoint, $json);
print_r($result);
}
$endpoint = 'https://trening-dev1.iai-shop.com/graphql/v1/?docLang=pl';
get($endpoint);