Get every combination of multiple arrays that can have multiple options

I know a similar question has been asked in the past but this one is a bit different. I'm looking to get every variation possible including multiple options from a single array so. I'm really struggling with this and I greatly appreciate any help in it.

$arrayA = array("1","2","3"); $arrayB = array("A","B");

Results should be

1 2 3 12 13 121 123 1A 1B 1C 1A 12A etc..

so the same value can't be repeated twice but can include others from the same array. The desired output is in the form of an array where it's easy to see what the pulled elements are.