To create a regex pattern that matches a string of text, use quotemeta. 

my $OldVerPat = quotemeta($OldVer);
s/$OldVerPat/$NewVer/

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quotemeta can be called via \Q..\E. 

s/\Q$OldVer\E/$NewVer/

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The \E can be ommitted since it's at the end of the pattern. 

s/\Q$OldVer\E/$NewVer/

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In reply to Re: Search/Replace action using "." by ikegami
in thread Search/Replace action using "." by rsperl

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