$posintmat = 0
$negintmat = 0
The string [ - ] is: not anything I recognize.
$posintmat = 0
$negintmat = 1
The string [ -8 ] is: a negative integer.
$posintmat = 1
$negintmat = 0
The string [ 8 ] is: a positive integer.

Separate associative arrays for GET/POST/COOKIE:

$_GET = Array ( )

$_POST = Array ( )

$_COOKIE = Array ( )

PHP also merges GET, POST and COOKIE data into one associative array:

$_REQUEST = Array ( )

The IP number 18.223.188.252 is where your client/browser is located.
Here's a complete dump of $_SERVER: Array ( [HOME] => /home/users/rem [USER] => rem [SCRIPT_NAME] => /~rem/HelloPlus/num.php [REQUEST_URI] => /~rem/HelloPlus/num.php [QUERY_STRING] => [REQUEST_METHOD] => GET [SERVER_PROTOCOL] => HTTP/1.1 [GATEWAY_INTERFACE] => CGI/1.1 [REMOTE_PORT] => 59267 [SCRIPT_FILENAME] => /home/users/rem/public_html/HelloPlus/num.php [SERVER_ADMIN] => webmaster@rawbandwidth.com [CONTEXT_DOCUMENT_ROOT] => /home/users/rem/public_html [CONTEXT_PREFIX] => /~rem [REQUEST_SCHEME] => http [DOCUMENT_ROOT] => /usr/local/www/apache24/data [REMOTE_ADDR] => 18.223.188.252 [SERVER_PORT] => 80 [SERVER_ADDR] => 198.144.193.2 [SERVER_NAME] => www.rawbw.com [SERVER_SOFTWARE] => Apache/2.4 [SERVER_SIGNATURE] => [LD_LIBRARY_PATH] => /usr/local/lib:/usr/local/lib [PATH] => /sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin [HTTP_HOST] => www.rawbw.com [HTTP_ACCEPT_ENCODING] => gzip, br, zstd, deflate [HTTP_USER_AGENT] => Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) [HTTP_ACCEPT] => */* [FCGI_ROLE] => RESPONDER [PHP_SELF] => /~rem/HelloPlus/num.php [REQUEST_TIME_FLOAT] => 1746142877.4667 [REQUEST_TIME] => 1746142877 [argv] => Array ( ) [argc] => 0 ) 1