parsing response POST data from curl_exec call - php

Question

I have the following code block which connects out to a secure service (payment transaction gateway), passes in some fields ($postData) and receives a response ($returnValue).
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://secure.service.com/data');
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_FRESH_CONNECT, 1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_FORBID_REUSE, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLINFO_HEADER_OUT, true);
if ($returnValue = curl_exec($ch))
{
$error = curl_error($ch);
}
When I display the contents of $returnValue ... they show as follows:
HTTP/1.0 200 OK Approved Date: Wed, 10 Aug 2011 09:24:15 GMT
Connection: close Content-Type: application/x-www-form-urlencoded
Content-Length: 182
avs_code=X&cvv2_code=P&status_code=1&processor=TEST&auth_code=999999&settle_amount=2000&settle_currency=USD&trans_id=120741127516&auth_msg=TEST+APPROVED&auth_date=2011-08-10+09:24:15
Is there a method or CURL call that breaks apart this result string into its component parts? or is that something I need to write myself? I need to get the response code (200), the approval/decline part (Approved) and the query string (avs_code ....). I tried looking through the curl_getinfo but that is only getting me the HTTP Response code, not the approval/decline or the query string values.
I'm a novice at PHP so please let me know if I'm missing an obvious method call or CURL parameter.

Answer 1

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_COOKIE, "");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
$result = curl_exec($ch);
$header=substr($result,0,curl_getinfo($ch,CURLINFO_HEADER_SIZE));
$body=substr($result,curl_getinfo($ch,CURLINFO_HEADER_SIZE));
curl_close($ch);
Than use something like preg_match_all("/Set-Cookie: (.*?)=(.*?);/i",$header,$res);
See preg_match_all manual

Answer 2

I suggest you look at http://php.net/manual/en/function.http-parse-headers.php manual, if you don't want to install PECL pecl_http - there are usefull user comments. For example:
function http_parse_headers($header) {
$retVal = array();
$fields = explode("\r\n", preg_replace('/\x0D\x0A[\x09\x20]+/', ' ', $header));
foreach ($fields as $field) {
if (preg_match('/([^:]+): (.+)/m', $field, $match)) {
$match[1] = preg_replace('/(?<=^|[\x09\x20\x2D])./e', 'strtoupper("\0")', strtolower(trim($match[1])));
if (isset($retVal[$match[1]])) {
$retVal[$match[1]] = array($retVal[$match[1]], $match[2]);
} else {
$retVal[$match[1]] = trim($match[2]);
}
}
}
return $retVal;
}
You can parse cookies and post values with http://php.net/manual/ru/function.http-parse-cookie.php (or functions in comments) and http://php.net/manual/en/function.parse-str.php . HTTP protocol is rather transparent.