not all headers available in $_SERVER [PHP]

Question

I have some custom header, and it's not visible in $_SERVER , but it visible with help apache_request_headers() .

And such problem existing only in one Windows based Apache version (OpenServer). On Mac and Linux Apache pass all headers to php, and I can see it in $_SERVER variable... maybe there is some restriction for windows? or is there any settings in apache.conf which can activate passing all header to mod_php?

Answer 1

When PHP is running as a Apache module on Windows, you won't see all headers on $_SERVER autoglobal array.

You have to retrieve them with apache_request_headers(). You could use some code to obtain cross platform deployment:

function GetHeader($myheader) {
  if (isset($_SERVER[$myheader])) {
    return $_SERVER[$myheader];
  } else {
    $headers = apache_request_headers();
    if (isset($headers[$myheader])) {
      return $headers[$myheader];
    }
  }
  return '';
}

If you PHP is newer enough, you could also try getallheaders().

http://php.net/manual/en/function.getallheaders.php

Answer 2

From PHP documentation: http://php.net/manual/en/reserved.variables.server.php

On the comments, notice that:

On Windows IIS 7 you must use $_SERVER['LOCAL_ADDR'] rather than $_SERVER['SERVER_ADDR'] to get the server's IP address.

It seems that some variable names are different in windows, so you'll have to find them out. If you have a close look at the documentation comments there are a few workarounds for some of them

Answer 3

php $_SERVER is weired better option is to use apache_request_headers()

But if you want to still use $_SERVER add HTTP_ and replace all - to _ and the last thing to remember if the request header has _ than it will not be parsed at all (lost)