laravel如何打印orm封裝的sql語句

$query = CdbForumSellthreadSearch::where($params)->orderBy("$orderby", "$ascDesc")->offset($start)->limit($limit);
$list = CdbForumSellthreadSearch::where($params)->orderBy("$orderby", "$ascDesc")->offset($start)->limit($limit)->get()->toArray();

 

//打印出的sql是預編譯的sql語句，帶有問號占位符的sql 

print_r($query->toSql());

 

//下面打印出占位符對應的變量的值，數組里面的順序和占位符的順序是一致的

echo '<pre>';

print_r($query->getBindings());

exit;