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Editorial Team
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Asked: 2026-05-27T15:50:48+00:00

I have the following response being sent from a server. How do i extract

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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="users@mris.com", nonce="3133323436313933383137343820335916269c13227f30b07bd83a1c7e0d", opaque="6e6f742075736564"
RETS-Version: RETS/1.5
X-Powered-By: Servlet/2.5 JSP/2.1
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1 Answer

  1. Editorial Team

    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];
}
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