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src/docs/markdown/caddyfile/directives/log_append.md

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+---
+title: log_append (Caddyfile directive)
+---
+
+# log_append
+
+Appends a field to the access log for the current request.
+
+This should be used alongside the [`log` directive](log) which is required to enable access logging in the first place.
+
+The value may be a static string, or a [placeholder](/docs/caddyfile/concepts#placeholders) which will be replaced with the value of the placeholder at the time of the request.
+
+
+## Syntax
+
+```caddy-d
+log_append [<matcher>] <key> <value>
+```
+
+
+## Examples
+
+Display in the logs the area of the site that the request is being served from, either `static` or `dynamic`:
+
+```caddy
+example.com {
+	log
+
+	handle /static* {
+		log_append area "static"
+		respond "Static response!"
+	}
+
+	handle {
+		log_append area "dynamic"
+		reverse_proxy localhost:9000
+	}
+}
+```