https://www.php.net/manual/zh/reflectionfunctionabstract.isvariadic.php
PHP: ReflectionFunctionAbstract::isVariadic - Manual
Checks if the function is variadic
phpmanual
https://www.php.net/manual/ja/reflectionfunctionabstract.isvariadic.php
PHP: ReflectionFunctionAbstract::isVariadic - Manual
phpmanual