Check multiple customer group id numbers

I am new to PHP & have the below code:

{if $checkcustomer->id_default_group==8 || 9 } {hook h="agProduct"} {/if} 

I need to make the groups more than just two, we have 5 groups that we want to show the hook agProduct to them, I don't think it would be like this:

 {if $checkcustomer->id_default_group==8 || 9 || 10 || 11 || 12 } {hook h="agProduct"} {/if}