Creating an array as a property of an object

Hello, folks -- lurking for a while, first post -- I'm relatively new to PHP but doing database design work for nearly 20 years. I've RTFM'ed (+ books + other resources) a bunch of times but I have a mental block around doing this: I want to have an multidimensional array as a property of an object. Example: MySQL Resource:

 WHAM_ID  NAME     AMOUNT
  5       Fred         99
  9       Albert      345
 23       Mary          5

(etc...) Inside the function which builds the instance of the object, I have language like: while ($line = mysql_fetch_array($result_set,MYSQL_ASSOC)) { $this->foom_array = array("MyKey".$line["wham_id"]=>array($line).","; } This isn't even close. <g> Any examples, or a well-written resource to help me do this? TIA Ken