Basic Information
$bytes_sent
number of bytes sent to a client (1.3.8, 1.2.5)
$host
in this order of precedence: host name from the request line, or host name from the “Host” request header field, or the server name matching a request
$hostname
host name
$remote_addr
client address
$request_length
request length (including request line, header, and request body) (1.3.12, 1.2.7)
$request_method
request method, usually “GET” or “POST”
$request_time
request processing time in seconds with a milliseconds resolution (1.3.9, 1.2.6); time elapsed since the first bytes were read from the client
$request_uri
full original request URI (with arguments)
$scheme
request scheme, “http” or “https”
$server_protocol
request protocol, usually “HTTP/1.0”, “HTTP/1.1”, “HTTP/2.0”, or “HTTP/3.0”
$status
response status (1.3.2, 1.2.2)
$time_iso8601, $time_local
local time in the ISO 8601 standard format (1.3.12, 1.2.7) and the Common Log Format (1.3.12, 1.2.7)
HTTP/2
$connection
connection serial number (1.3.8, 1.2.5)
$connection_requests
current number of requests made through a connection (1.3.8, 1.2.5)
$connection_time
connection time in seconds with a milliseconds resolution (1.19.10)
TCP Information
$tcpinfo_rtt, $tcpinfo_rttvar, $tcpinfo_snd_cwnd, $tcpinfo_rcv_space
information about the client TCP connection; available on systems that support the TCP_INFO socket option