apache_request_headers

apache_request_headers.php

<?php

print_r(apache_request_headers());

foreach ($_SERVER as $key => $val)
{
	if (sscanf($key, 'HTTP_%s', $header) === 1)
	{
		// take SOME_HEADER and turn it into Some-Header
		$header = str_replace('_', ' ', strtolower($header));
		$header = str_replace(' ', '-', ucwords($header));
		echo $key . ' ' . $header . ' ' . $_SERVER[$key] . "\n";
	}
}

$ curl chernjie.localhost/apache_request_headers.php -H "dash-and_under: score" -s | column -t
Array
(
        [User-Agent]         =>      curl/7.29.0
        [Host]               =>      chernjie.localhost
        [Accept]             =>      */*
        [dash-and_under]     =>      score
)
HTTP_USER_AGENT      User-Agent      curl/7.29.0
HTTP_HOST            Host            chernjie.localhost
HTTP_ACCEPT          Accept          */*
HTTP_DASH_AND_UNDER  Dash-And-Under  score