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For 2023 (and 2024 ...) - we are now fully retired from IT training.
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crypt function~disallow the '/' character

Posted by ability (ability), 23 October 2002
anybody know how to disallow the function crypt from adding the '/' (forward slash) to a word that it encrypts??

Posted by admin (Graham Ellis), 24 October 2002
The short answer is that you can't  

The crypt function is used to encode passwords using the DES algorithm.  This takes the word that you want to encode, plus a 2 character "salt" and produces a 13 character string which may contain the 64 characters A to Z a to z 0 to 9 . (period) and / (forward slash).

Are you by any chance using the encoded string as a file name?   If so, you could substitute any / characters you get in the encoding to something else - foe example _ or - (underscore or hyphen):
     $encoded = crypt($plaintext,$salt)
     $encoded =~ s!/!_!g;

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