Sending Custom Header with CURL

Question

I want to send a request to a web service via an API as shown below, i have to pass a custom http header(Hash), i'm using CURL, my code seems to work but I'm not getting the rigth response, I'm told it has to do with the hash value, though the value has been seen to be correct, is there anything wrong with the way I'm passing it or with the code itself.

 <?php
    $ttime=time();
    $hash="123"."$ttime"."dfryhmn";
    $hash=hash("sha512","$hash");
    $curl = curl_init();
    curl_setopt($curl,CURLOPT_HTTPHEADER,array('Hash:$hash'));      
    curl_setopt ($curl, CURLOPT_URL, 'http://web-service-api.com/getresult.xml?clientid=456&time=$ttime');  
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);  
    $xml = curl_exec ($curl);  

    if ($xml === false) {
        die('Error fetching data: ' . curl_error($curl));  
    }
    curl_close ($xml);  

    echo htmlspecialchars("$xml", ENT_QUOTES);

    ?>

Solution 1

'Hash:$hash' should be either "Hash: $hash" (double quotes) or 'Hash: '.$hash

The same goes for your URL passed in CURLOPT_URL

Solution 2

If you need to get and set custom http headers in php, the following short tutorial is really useful:

Sending The Request Header

$uri = 'http://localhost/http.php';
$ch = curl_init($uri);
curl_setopt_array($ch, array(
    CURLOPT_HTTPHEADER  => array('X-User: admin', 'X-Authorization: 123456'),
    CURLOPT_RETURNTRANSFER  =>true,
    CURLOPT_VERBOSE     => 1
));
$out = curl_exec($ch);
curl_close($ch);
// echo response output
echo $out;

Reading the custom header

print_r(apache_request_headers());

you should see

Array
(
    [Host] => localhost
    [Accept] => */*
    [X-User] => admin
    [X-Authorization] => 123456
    [Content-Length] => 9
    [Content-Type] => application/x-www-form-urlencoded
)

Custom Headers with PHP CGI

in .htaccess

RewriteEngine On
RewriteRule .? - [E=User:%{HTTP:X-User}, E=Authorization:%{HTTP:X-Authorization}]

Reading the custom headers from $_SERVER

echo $_SERVER['User'];    
echo $_SERVER['Authorization'];

Resources

• http://www.omaroid.com/php-get-and-set-custom-http-headers/
• How can I get PHP to display the headers it received from a browser?