This is how you would implement it in plain php ($response is the json response of snapdeal then):
<?php
/**
* curl -H "Snapdeal-Affiliate-Id:aaaaa" -H "Snapdeal-Token-Id:bbbbb"
* "affiliate-feeds.snapdeal.com/feed/api/category/v1:586:1461823?expiresAt=1441751400001&signature=cvtwgjgrrbozmumlaalg" -H "Accept:application/json"
*/
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "affiliate-feeds.snapdeal.com/feed/api/category/v1:586:1461823?expiresAt=1441751400001&signature=cvtwgjgrrbozmumlaalg");
curl_setopt(
$ch, CURLOPT_HTTPHEADER,
array(
'Snapdeal-Affiliate-Id:aaaaa',
'Snapdeal-Token-Id:bbbbb',
'Accept:application/json'
)
);
$response = curl_exec($ch);
curl_close($ch);
// work with $response here:
$data = json_decode($response);