php digest authentication

According to the description of ,

A1=MD5(::)

A2=MD5(:)

Final result: MD5(MD5(A1)::::MD5(A2))

Pay attention to the MD5(A1 in the above line ) and MD5(A2) are problematic. The browser implements MD5(A1::::A2)

$realm= 'saberyjs';
$password='0011';//This way to query the database is just for testing convenience;
if(!isset($_SERVER['PHP_AUTH_DIGEST']))
{
$n> header ("www-authenticate:Digest realm ='".$realm."',nonce='".$nonce."',algorithm='md5',qop='auth'");
header("HTTP/1.0 401 Unauthorization Required");
exit();
}
else
{
       //echo 'sset';
                                                                                 ult=parse_auth_digest($_SERVER['PHP_AUTH_DIGEST'] );
             //var_dump($result);
                                                                                               
                                           //echo 'The random number has expired'; md5',qop='auth'");
header("HTTP/1.0 401 Unauthorization Required");
exit();
t['username'].":". $result['realm'].":".$password);
//$A1=md5($result['username'].':'.$result['realm'].':'.$password ).':'.$result['nonce'].':'.$result['cnonce'];
$A2=md5($_SERVER['REQUEST_METHOD'].":".$result['uri' ]);
$degest=md5($A1.":".$result['nonce'].':'.$result['nc'].':'.$result['cnonce'].': '.$result['qop'].':'.$A2);
// var_dump($degest);
if($degest!=$result['response'])
;
               var_dump($result);
function parse_auth_digest($auth_digest)
{
$pairs=array();
preg_match_all('/(w+ )=['"]?([/a-z0-9A-Z.]+)['"]?/i',$auth_digest,$result,PREG_SET_ORDER);
foreach($result as $value)
$ pairs [$ value [1]] = $ value [2];
// var_dump ($ pairs);
return $ pairs;
}
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The above has introduced PHP digest authentication, including aspects of it. I hope it will be helpful to friends who are interested in PHP tutorials.