protected function transformHeadersToServerVars(array $headers)
{
$server = [];
$prefix = 'HTTP_';
foreach ($headers as $name => $value) {
$name = strtr(strtoupper($name), '-', '_');
if (!Str::startsWith($name, $prefix) && $name !== 'CONTENT_TYPE') {
$name = $prefix . $name;
}
$server[$name] = $value;
}
return $server;
}