How to take http header response values in a variable?

Question

I have the following response being sent from a server. How do i extract the part of the string www-authenticate into variable called $realm, $nonce, $opaque ?

The following output is being generated by a curl request and i'm printing the response headers :

HTTP/1.1 401 Unauthorized
Cache-Control: private
Date: Fri, 23 Dec 2011 05:49:41 GMT
Content-Length: 0
Content-Type: text/html
WWW-Authenticate: Digest realm="[email protected]", nonce="3133323436313933383137343820335916269c13227f30b07bd83a1c7e0d", opaque="6e6f742075736564"
RETS-Version: RETS/1.5
X-Powered-By: Servlet/2.5 JSP/2.1

deceze · Accepted Answer · 2011-12-23 06:11:45Z

1

First, parse the headers into a general array:

$headers = explode("\n", $headers);
foreach ($headers as $header) {
    list($key, $value) = explode(': ', $header, 2);
    $headers[$key] = $value;
}

Then, parse the WWW-Authenticate header with something like this:

$params = array();
preg_match_all('/(\w+)="([^"]+)"/', $headers['WWW-Authenticate'], $matches, PREG_SET_ORDER);
foreach ($matches as $match) {
    $params[$match[1]] = $match[2];
}

answered Dec 23, 2011 at 6:11

deceze♦

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1 Comment

hakre Over a year ago

This short code has problems with multi-line header values. Just noting, RFC is here: rfc2616 4.2 Message Headers

josegil · Accepted Answer · 2011-12-23 07:01:53Z

0

Using the function get_headers http://es2.php.net/get_headers you can get an array with the values of the header.

answered Dec 23, 2011 at 7:01

josegil

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1 Comment

kontur Over a year ago

this will get the headers for a given url, not for the currently requested script

kontur · Accepted Answer · 2011-12-23 11:10:45Z

0

$headers = getallheaders();
preg_match_all('/\"([^"])*\"/', $headers['WWW-Authenticate'], $matches);
print_r($matches);

This gets the headers with getallheaders(), picks your www-auth, and then filters every value between quotes into the $matches array by a regular expression. Access your values via $matches[0] etc.

edited Dec 23, 2011 at 11:10

answered Dec 23, 2011 at 8:13

kontur

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