What are some common PHP server variables and how can they be accessed?

Common PHP server variables include $_SERVER['HTTP_USER_AGENT'], $_SERVER['REMOTE_ADDR'], and $_SERVER['REQUEST_METHOD']. These variables can be accessed in PHP scripts to gather information about the client's browser, IP address, and the HTTP request method being used. 

$user_agent = $_SERVER['HTTP_USER_AGENT'];
$remote_addr = $_SERVER['REMOTE_ADDR'];
$request_method = $_SERVER['REQUEST_METHOD'];

echo "User Agent: " . $user_agent . "<br>";
echo "Remote Address: " . $remote_addr . "<br>";
echo "Request Method: " . $request_method . "<br>";

Keywords

PHP server variables superglobal $_SERVER access

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