How to set curl request properly in php laravel 5.5 - php

Question

I am trying to make a curl request!
Here I can make this request using postman and I am getting response perfectly using postman:
My Body parameter is: sub_domain
and my header is x-api-key value is something ZYWHUYAOSYSOASYYY
Ind i can get response perfectly!
But here want to make curl request on my end:
My Controller Code:
public function curlPost()
{
$data1 = [
'sub_domain' => 'value_1',
];
$curl = curl_init();
curl_setopt_array($curl, array(
CURLOPT_URL => "https://uwxcdwsc0k.execute-api.us-east-
1.amazonaws.com/prod/domain",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30000,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode($data1),
CURLOPT_HTTPHEADER => array(
// Set here required headers
"x-api-key: KiZTkTO9Ex2ZCOr7xmYRA4bInlJc9kVNrVN2INrc",
),
));
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
print_r(json_decode($response));
}
}
and my Routes/api.php:
Route::post('subdomain', 'ApiController#curlPost');
and when i hit post request using postman i get error
stdClass Object
(
[code] => [422] Unprocessable Entity
[message] => sub_domain is required
)
Your help will be highly appreciated!

Answer 1

Add this to your header array,
'Content-Type:application/json'

Answer 2

Make the $data an array as below:
$data1 = array(
'sub_domain' => 'value_1'
);
Cheers