stmt_init(); if($amount = $db->prepare("SELECT eid,amount,quantity,total FROM Inventory WHERE amount!='n/a' AND quantity!='n/a' AND total!='n/a'")){ /* execute */ if($amount->execute()){ /* fetch result by rows and generate response to script */ $result = $amount->get_result(); $response = array(); while($mult = $result->fetch_assoc()){ $key = $mult["eid"]; $a = $mult["amount"]; $q = $mult["quantity"]; $t = $mult["total"]; if(floatval($a)*floatval($q) != floatval($t)){ echo $key . '
'; //echo floatval($a)*floatval($q) . ' ' . floatval($t) . '
'; } } } } ?>