mysql 排序求助

PHP code

比如sql ="SELECT * FROM A WHERE `id` IN (5,18,25,4)"

现在的问题是怎么才能实现排序按照in数组（5,18,25,4）里的顺序来排序结果集？


[解决办法]
... order by find_in_set(id, '5,18,25,4')