如何在mysql中处理数组?

I have some questions about handling with array concerning storing in mysql.

I stored an array (of numbers) in my mysql database as text Like: COLUMN_ARRAY: [2,3,4,5,6,7]

( including [ and ] )

  • My first question: is this a good method or can I work with that for my further steps? or are there any other better methods for storing array in sql column?

  • My second question: how could it be possible to pick every single element, or go throu all elements in the array with php?

because I want to make a query like if COLUMN_ARRAY includes the number 3 then do blablabla...

maybe you can give me some hint, idea, link or tutorial :)

EDIT:

Ok I did some change and changed everything to something like that:

How to store arrays in MySQL?

the only problem is now: how can I handle with an array (like [1,2,3]) in php - to handle with every single element in that?