正在努力处理以下代码，该代码不起作用（$ThisYear参数）

$ThisYear = date("Y"); 
$ThisYear = strtotime($ThisYear);
$sql2 = 'SELECT 
            distinct 
            DATE_FORMAT(TransDate, "%M %Y") as MonthYear
            , DATE_FORMAT(TransDate, "%Y") as TransYear
            , DATE_FORMAT(TransDate, "%m") as TransMonth 
        from Leave 
        where YEAR(TransDate) =**"$ThisYear"**
        group by DATE_FORMAT(TransDate, "%M %Y") 
        order BY YEAR(TransDate), MONTH(TransDate) desc';

与此相反的是，

$ThisYear = date("Y"); 
$sql2 = 'SELECT 
            distinct 
            DATE_FORMAT(TransDate, "%M %Y") as MonthYear
            , DATE_FORMAT(TransDate, "%Y") as TransYear
            , DATE_FORMAT(TransDate, "%m") as TransMonth 
        from Leave 
        where YEAR(TransDate) =**2022**
        group by DATE_FORMAT(TransDate, "%M %Y") 
        order BY YEAR(TransDate), MONTH(TransDate) desc';