/**
* Get all headers from Server environment
* saves the headers array to static variable
*
* @return void
*/
private static function parseRequestHeaders()
{
$headers = [];
foreach ($_SERVER as $key => $value) {
if (substr($key, 0, 5) != 'HTTP_') {
continue;
}
$header = str_replace(' ', '-', ucwords(str_replace('_', ' ', strtolower(substr($key, 5)))));
$headers[$header] = $value;
}
self::$headers = $headers;
}
