recursion - How do I break results sets into smaller subsets for subtotaling/hierarchical purposes in PHP? -


i have sizable results sets being returned mysql db need break smaller sets either:

  • adding numbers within subsets subtotaling purposes; or
  • for creating hierarchical table.

the tricky part though need divide results set more once, , number of subdivisions can change per table.
example, might have break results set year , month in order produce subtotals each year/month combination.

i'm trying write php function can take results set , columns split data on , produce new results set divided up.
example, if split data year , month, i'd want have following structure returned:

array(   'divider' => 'year',   'sets' => array(     [0] => array(       'divider' => 'month',       'sets' => array(         [0] => array(), //row returned db         [1] => array(), //row returned db         [2] => array(), //row returned db         ...       )     ),     [1] => array(       'divider' => 'month',       'sets' => array(         [0] => array(), //row returned db         [1] => array(), //row returned db         [2] => array(), //row returned db         ...       )     )     ...   ) )

is there way recursively or in way regardless of how many subdivisions there are, type of multidimensional array want?

thank you.


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