How to add custom properties to the request header

How to add custom properties to the request header
However, you need to add custom attributes in the request header. For example mimi=3322

How do you define this?

$mimi = MD5 (3322);

$h = Array ("mimi:{$mimi}");
curl_setopt ($ch, Curlopt_httpheader, $h);
$result = curl_exec ($ch);


Var_dump ($result);


Do you think so? But I test to test go, send the request can not find their own defined properties Oh!~!~
------to solve the idea----------------------

$url = ' http://www.example.com/server.php ';
$mimi = MD5 (3322);

$header = Array (
    "Mimi:{$mimi}"
);

$ch = Curl_init ();
curl_setopt ($ch, Curlopt_returntransfer, true);
curl_setopt ($ch, Curlopt_url, $url);
curl_setopt ($ch, Curlopt_httpheader, $header);
$response = curl_exec ($ch);
if ($error =curl_error ($ch)) {
    Die ($error);
}
Curl_close ($ch);

Echo $response;

server.php

$data = isset ($_server[' Http_mimi ')? $_server[' Http_mimi ': ';
Echo $data;

