cURL post with PHP failing - api

Question

Using Postman, I have been able to successfully create an API call to retrieve information from the webserver.
However, I have been unsuccessful in doing the same with PHP. Following are a few screenshots from Postman which I am trying to replicate in PHP.
This is my PHP code -
$filters = array("1234", "28");
$selectors = array("Brand", "Name");
$body = array('Filter' => array('SKU'=>$filters, 'OutputSelector' => $selectors));
$url = "https://xyz.neto.com.au/do/WS/NetoAPI";
$method = "POST";
$headers = array(
"NETOAPI_ACTION: GetItem",
"NETOAPI_KEY: xxxxxxx",
"Accept: application/json",
"NETOAPI_USERNAME: puneeth"
);
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $method);
curl_setopt($ch, CURLOPT_POSTFIELDS, $body);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
$response = curl_exec($ch);
$err = curl_error($ch);
curl_close($ch);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}
P.S I have deliberately fudged the url and key.
I am trying to follow instructions as outlined here - https://developers.neto.com.au/documentation/engineers/api-documentation/products/getitem

Answer 1

Few things that might be preventing your code from working:
1. Array to string conversion
You have declared the body of the request as an array in $body. You need to JSON-encode it before passing it to cURL:
$body = array('Filter' => array('SKU'=>$filters, 'OutputSelector' => $selectors));
$bodyJSON = json_encode($body);
[...]
curl_setopt($ch, CURLOPT_POSTFIELDS, $bodyJSON);
2. HTTPS request
If you're getting an empty response, you'll also need to configure cURL for SSL communication. A quick fix for this is to ignore the remote server certificate validity:
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
Although this works, see this answer for a better solution.
3. Missing Content-Type
When sending raw postfields, some servers need to know what type of data you're sending. This is done by setting a Content-Type header:
$headers = array(
"Content-Type: application/json",
[...]
);