PHP接收http请求头信息

foreach (getallheaders() as $name => $value) {
    echo "$name: $value\n";
}

function em_getallheaders()
{
    $headers = [];
    foreach ($_SERVER as $name => $value) {
        if (substr($name, 0, 5) == ‘HTTP_‘) {
            $headers[str_replace(‘ ‘, ‘-‘, ucwords(strtolower(str_replace(‘_‘, ‘ ‘, substr($name, 5)))))] = $value;
        }
    }
    return $headers;
}