There are a few things here that could use a little tidying. First off, the mandatory mantra: Always use strictures (use strict; use warnings; - see The strictures, according to Seuss).
Of more immediate benefit: if you find you need to include double quote character in a string use qq for quoting instead of " (see perlop's Quote and Quote-like Operators). For example your print statements become:
print qq{Matched: "$&"\n}; # print match
print qq~Before match: "$`"\n~; # print data before match
print qq|After match: "$'"\n|; # print data after match
although you may wish to use a here-doc instead (look for here-doc in the same docs mentioned above):
print <<STUFF;
Matched: "$&"
Before match: "$`"
After match: "$'"
STUFF
Perl reduces
RSI - it saves typing
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