function get_all_headers() {
$headers = array();

foreach($_SERVER as $key => $value) {
if(substr($key, 0, 5) === ‘HTTP_’) {
$key = substr($key, 5);
$key = strtolower($key);
$key = str_replace(‘_’, ‘ ‘, $key);
$key = ucwords($key);
$key = str_replace(‘ ‘, ‘-‘, $key);

$headers[$key] = $value;
}
}

return $headers;
}