Find closest matching array in SQL and PHP -

i think may missing conceptually or in wording, because can't seem find need.

each user have array of, 20 items, like

array(123,482,836,496,etc) 

and find user has matching elements. assume won't have loop through , make bunch of queries.

could point me in right direction? i'll post final code when going, else.

array_intersect — computes intersection of arrays you're looking for.