Try This 
$str = "today is wednesday.tomorrow IS THURSDAY.";

print "$str\n";

$str =~ s/(.*)/\L$1/gis;

$str =~ s/\.(\w)/\.\u$1/gis;

$str =~ s/\A(\w)/\u$1/gis;

print "\n$str\n";

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In reply to Re: regex for text manipulation by Praveen
in thread regex for text manipulation by megaurav2002

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