The three line-endings I've encountered are
\n from UNIX,
\r\n from DOS, and
\r from some Mac's. I usually preprocess multiline strings from forms with:
s/\r\n/\n/g;
s/\r/\n/g;
This puts everything in UNIX-style line endings.
You could also do this in your split:
split(/\r\n|\r|\n/,$s)
; this is probably a little faster, and saves you a chomp.
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