Array name out of field value with data

Not so sure if I've tried to work this out before in this list. I'm trying to make an array name by a field/row value and assigning values to it. But I'm having some problems getting it to work. Is it possible to do this? And if, what am I doing wrong? Or is there any other way to do it? while($row=mysql_fetch_array($result)) { // Checking if variable/array is not declared if (!$$row[0]) { // Declaring an empty array by the value of sales person code $$row[0] = array(); // Current sales person code $code = $row[0]; // Putting the product name as a key and the price as a value in the array eval("\$code[\$row[1]] = \"$row[2]\";"); } } Thanks