diff -Nru z-push.org/index.php z-push.mod/index.php
--- z-push.org/index.php	2010-11-19 22:20:24.000000000 +0100
+++ z-push.mod/index.php	2011-03-08 16:25:49.000000000 +0100
@@ -111,7 +111,12 @@
 }
 
 // Get the request headers so we can get the AS headers
-$requestheaders = array_change_key_case(apache_request_headers(), CASE_LOWER);
+if (function_exists ('apache_request_headers'))
+  $requestheaders = array_change_key_case(apache_request_headers(), CASE_LOWER);
+else
+  foreach ($_SERVER as $Key=>$Value)
+    if (substr ($Key, 0, 5) == 'HTTP_')
+        $requestheaders [str_replace ('_', '-', strtolower (substr ($Key, 5)))] = $Value;
 
 global $protocolversion, $policykey, $useragent;
 $protocolversion = (isset($requestheaders["ms-asprotocolversion"]))? $requestheaders["ms-asprotocolversion"] : "1.0";