Error when doing cURL request - php

Question

This code always returns user doesn't exist from the API:
$data2 = array('user'=>$vars['mcusername'],
'pwd'=>$vars['mcpassword'],
'group'=>$postfields['group'],
'action'=>'Save');
// Connect to dvb API
$configWebAddress = "http://192.168.0.12:4040/dvbapi.html?part=userconfig&";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $configWebAddress);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 30);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data2);
$data = curl_exec($ch);
curl_close($ch);
The string that works in a browser is this:
dvbapi.html?part=userconfig&user=PeterTest&pwd=obfuscated&group=1,2&disabled=0&action=Save

Answer 1

When you access the URL in the browser, you're performing a GET. In your cURL attempt, you're attempting to POST. This is likely the issue; the script may only accept GET.
Try using this cURL code instead:
// Gather up all the values to send to the script
$data2 = array('part' => 'userconfig',
'user' => $vars['mcusername'],
'pwd' => $vars['mcpassword'],
'group' => $postfields['group'],
'action' => 'Save');
// Generate the request URL
$configWebAddress = "http://192.168.0.12:4040/dvbapi.html?".http_build_query($data2);
// cURL the URL for a responce
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $configWebAddress);
curl_setopt($ch, CURLOPT_TIMEOUT, 30);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$data = curl_exec($ch);
curl_close($ch);
// Show the responce
var_dump($data);
You can use http_build_query() to turn your array into a URL-encoded string to make the GET request.