怎么在请求头里添加自定属性

如何在请求头里添加自定属性,
但需要在请求头里添加自定属性.例如 mimi=3322

如何定义这个?

$mimi = md5(3322);

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


var_dump($result);


这样吗?可我测试来测试去,发送的请求都找不到自己定义的属性哦!~!~
------解决思路----------------------

$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;