Save all the records with a value in an array

[tuxor]

Hi guys, here is my problem:

I have a table1: id, name, color, size;
And I need to save all the id's with size=3 in an array: $ids=array(list of all the id of register with size=3);

Then Use the array to make a query, for all the items of the array, example: $registro = sql("select * from `table1` where `id`='$ids[]' limit 1", $eo);

How can do that?

Thanks.