what about 8bit set chars? are they safe? possible sql code? quotes? cgi meta chars like '%', '&', '=' and '?'? It's hard to exhaust this list of possiblities.
Instead of filtering out what may be bad, we filtering in what is okay.
tr/a-zA-Z0-9.,_-//cd; # If, for example, alphaneumericals and
# '.', ',', '_', and '-' are legal inputs.
# Anything else is zapped.
# this is done by complementing the list
# /c tells the engine to translate anything
# *not* in the list.
-nuffin
zz zZ Z Z #!perl
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