使用PHP上传Excel并基于日期值拆分成多个文件

I'm stuck in my coding...

I created file upload and get the value from the uploaded file (excel) then I wanna split into multiples file based on uploaded file.. How to do that?

I just created file that successfully created multiples file but the value in its file creating that I don't want to...

This is example file I upload (.xlxs)

store_number | order_number | business_date | item_number | description

123          | 123.1        | 2019-02-01    | AA1         | tea

123          | 123.2        | 2019-02-01    | AA1         | tea 

124          | 124.1        | 2019-02-01    | AA3         | coffee

124          | 124.1        | 2019-02-02    | AA2         | juice 

So, based on the excel file, when I uploaded this.. I wanna split into 3 file based on store_number and business_date

123_2019-02-01

124_2019-02-01

124_2019-02-02

How to do that? Thanks