php - updating and searching mysql set using php

Question

I have a column in table which has possible values of tom,john,jerry(SET). I have a variable that a user enter and I store it in $var and want that at some point. I could check that if the value in $var exists in particular row then don't update else update, How I can do this in PHP. I have several rows like tom,john

    john,jerry

I dont want tom,john,tom

Answer 1

我有一个建议。

请更改数据库值，以便您拥有：（,tom,john,tom,注意附加和前面的逗号,。

现在，如果您想搜索tom，请触发如下 SQL：

SELECT id FROM DB_TBL WHERE field LIKE '%,$val,%'

对用户输入的所有值重复此操作，或用逗号放入单个文本框中。

希望这有效。