Retest with "killer" params  

Raw display of $_GET:

$_REQUEST ($_GET, $_POST and $_COOKIE):
array (
)
$_SERVER:
array (
  'PATH' => '/sbin:/usr/sbin:/bin:/usr/bin',
  'PP_CUSTOM_PHP_INI' => '/var/www/vhosts/system/rhaworth.com/etc/php.ini',
  'PP_CUSTOM_PHP_CGI_INDEX' => 'fastcgi',
  'SCRIPT_NAME' => '/test/showenv.php',
  'REQUEST_URI' => '/test/showenv.php',
  'QUERY_STRING' => '',
  'REQUEST_METHOD' => 'GET',
  'SERVER_PROTOCOL' => 'HTTP/1.1',
  'GATEWAY_INTERFACE' => 'CGI/1.1',
  'REMOTE_PORT' => '43560',
  'SCRIPT_FILENAME' => '/var/www/vhosts/rhaworth.net/rh_com/test/showenv.php',
  'SERVER_ADMIN' => 'rwhaworth@gmail.com',
  'DOCUMENT_ROOT' => '/var/www/vhosts/rhaworth.net/rh_com',
  'REMOTE_ADDR' => '34.229.131.116',
  'SERVER_PORT' => '80',
  'SERVER_ADDR' => '195.224.99.180',
  'SERVER_NAME' => 'rhaworth.com',
  'SERVER_SOFTWARE' => 'Apache',
  'SERVER_SIGNATURE' => '',
  'HTTP_CONNECTION' => 'close',
  'HTTP_HOST' => 'rhaworth.com',
  'HTTP_ACCEPT_ENCODING' => 'br,gzip',
  'HTTP_IF_MODIFIED_SINCE' => 'Sat, 07 Dec 2019 20:37:03 CET',
  'HTTP_ACCEPT_LANGUAGE' => 'en-US,en;q=0.5',
  'HTTP_ACCEPT' => 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
  'HTTP_USER_AGENT' => 'CCBot/2.0 (https://commoncrawl.org/faq/)',
  'UNIQUE_ID' => 'XiKnMcPgY7QAALD@HGQAAAAF',
  'FCGI_ROLE' => 'RESPONDER',
  'PHP_SELF' => '/test/showenv.php',
  'REQUEST_TIME_FLOAT' => 1579329329.672480106353759765625,
  'REQUEST_TIME' => 1579329329,
)
$_SESSION:
NULL
$_ENV:
array (
)
$_FILES:
array (
)
$argc =   
 
$argv:
NULL
$_GET:
array (
)
$_POST:
array (
)
$_COOKIE:
array (
)
getcwd() (matches $_SERVER['SCRIPT_FILENAME']): '/var/www/vhosts/rhaworth.net/rh_com/test'
 
getdate():
Array
(
    [seconds] => 29
    [minutes] => 35
    [hours] => 6
    [mday] => 18
    [wday] => 6
    [mon] => 1
    [year] => 2020
    [yday] => 17
    [weekday] => Saturday
    [month] => January
    [0] => 1579329329
)
phpversion():  5.4.45 
ShowEnv   RWH   2015 Aug 28  16:50   |   php file date:  2015 Aug 28  16:54:48
All sites: localhost | RHaworth.net | WMflabs | southlondonquakers.org.uk | RHaworth.com (interceptor) | toolserver
RHaworth.110mb.com (moribund) | CroyDFAS (dead)