$_SERVER Data
$_SERVER is a super global array that containing information such as headers, paths, and script locations etc.
By using the $_SERVER array you can get many server information like Server IP, Document root, Server name, server software and more. The sever super global array are created by the server varies from server to server.
Here is all server element
HTTP_HOST HTTP_CONNECTION HTTP_CACHE_CONTROL HTTP_ACCEPT HTTP_UPGRADE_INSECURE_REQUESTS HTTP_USER_AGENT HTTP_DNT HTTP_REFERER HTTP_ACCEPT_ENCODING HTTP_ACCEPT_LANGUAGE HTTP_COOKIE PATH SystemRoot COMSPEC PATHEXT WINDIR SERVER_SIGNATURE SERVER_SOFTWARE SERVER_NAME SERVER_ADDR SERVER_PORT REMOTE_ADDR DOCUMENT_ROOT REQUEST_SCHEME CONTEXT_PREFIX CONTEXT_DOCUMENT_ROOT SERVER_ADMIN SCRIPT_FILENAME REMOTE_PORT GATEWAY_INTERFACE SERVER_PROTOCOL REQUEST_METHOD QUERY_STRING REQUEST_URI SCRIPT_NAME PHP_SELF REQUEST_TIME_FLOAT REQUEST_TIME
Some important server elements
<?php echo "Host: " . $_SERVER["HTTP_HOST"] . "<BR>"; echo "Browser: " . $_SERVER["HTTP_USER_AGENT"] . "<BR>"; echo "User's IP address: " . $_SERVER["REMOTE_ADDR"]." "; echo "User's Software: " . $_SERVER["SERVER_SOFTWARE"]." "; echo "User's name: " . $_SERVER["SERVER_NAME"]." "; ?>
Output
Host: localhost Browser: Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.112 Safari/537.36 User's IP address: ::1 User's Software: Apache/2.4.4 (Win64) PHP/5.4.12 User's name: localhost
Print complete server elements
<?php
echo "Complete Server Details";
foreach($_SERVER as $key => $value){
echo $key."=====".$value."</br>";
}
?>
