add docs: how to get POST body in ESP8266WebSever (#6736)

voanhcuoc · d-a-v · commit 6626b2fb079b · 2019-11-09T08:55:18.000+01:00
diff --git a/libraries/ESP8266WebServer/README.rst b/libraries/ESP8266WebServer/README.rst
@@ -96,7 +96,7 @@ Getting information about request arguments
   int args();
   bool hasArg();
 
-``arg`` - get request argument value
+``arg`` - get request argument value, use ``arg("plain")`` to get POST body
 	
 ``argName`` - get request argument name
 	
