> My first thought was to use translate(), but the second 
> argument would have to contain every possible character I 
> want to remove, which seems pretty unwieldy. 

There's a trick to this:

translate($x, translate($x, 'abcde', ''), '')

will remove all characters except a,b,c,d, and e from your string $x.

Michael Kay
Software AG
home: Michael.H.Kay@xxxxxxxxxxxx
work: Michael.Kay@xxxxxxxxxxxxxx 


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