求助PHP搜索写法 请高手指点！
A表、B表字段均为数字类字符串：如‘2，3，6，34，23’、‘43，23，8，35’。。。。
现在要用A表字段去搜索B表，请高手指点下
开始是把A字段打成数组去likeB字段，结果发现不行，如果A字段里有3，那么B字段里23，33，43。。。带3的都会被检索。
所以求更好的解决方法！
------解决方案--------------------
like '2,'
------解决方案--------------------
你保存数据时，前后都一定要带有 ,
构造成这样：,2,,4,
然后你就用 like ',3,'
------解决方案--------------------
把A字段打成数组去 like B字段
是不行的，原因你也知道了
但是 把A字段打成数组 是对的
比较时用 find_in_set 就行了
比如
find_in_set('3','23,33,43')
就不会匹配到
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