VDS Renaissance 的界面提供多种语言。官方文档以英语维护，以确保提供统一、一致且始终最新的参考。
@REGEXISTS
Windows ✓Linux ✓macOS ⏳
Syntax
@REGEXISTS( <root key>, <subkey>, <value> )Description
This function returns a true ('1') or false (null) value depending on whether the specified key or value exists. If no <value> name is specified, the function tests if the key exists. If a <value> name is specified, it tests if the value itself exists. For more information on how to specify the key or value, see @REGREAD.
OK
Unchanged.