SELECT problem..Need urgent help !!!!

["Phpu" <phpu@xxxxx>]

Hi,

I have an array named $ex_array.

I want to search the database and find those ids that are different from the values in $ex_array.

I use this but didn't work

$sql = "SELECT product_id FROM products WHERE product_id <> '$ex_array' " ; 


Thanks for any help !!!!