Failing to post json to an endpoint using curl - php

Question

Im trying to create a simple api that will post json to an endpoint using curl and php. its giving me an error whereby its saying unsupported media type and i need help seeing what it is i might be doing wrong, here is the code
<?php
$data = array("saleAmount"=>"2000","cashBack"=>"800","posUser"=>"John","tenderType"=>"SWIPE","currency"=>"RTGS","transactionId"=>'0001');
$payload = json_encode($data);
echo $payload;
// prepare curl
$ch = curl_init('http://localhost:9111/api/requests');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLINFO_HEADER_OUT, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
'Content-Type: application/jsonp',
'Content-Length: ' . strlen($payload))
);
// Submit the POST request
$result = curl_exec($ch);
echo json_encode($result);
// Close cURL session handle
curl_close($ch);
?>

Answer 1

The issue is that your API is expecting a different media type than the one you are providing in your quest.
https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/415
Make sure that your API supports the content-type application/json

Answer 2

$url="";//path of api
$ch=curl_init($url);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
'Content-Type: application/json')
);
$data = array("saleAmount"=>"2000","cashBack"=>"800","posUser"=>"John","tenderType"=>"SWIPE","currency"=>"RTGS","transactionId"=>'0001');
$data=json_encode($data);
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
curl_setopt($ch,CURLOPT_POST,true);
curl_setopt($ch,CURLOPT_POSTFIELDS,$data);
$response=curl_exec($ch);
print_r($response);die;
curl_close($ch);
Append your url in $url and check this once.