use strict;
my $str = 'Target: 4.6.9
4.6.91
4.6.19
4.6.1
4.6.10
4.63.9
4.56.9
4.7.9
4.5.9
4.10.9
4.1.9
42.6.9
24.6.9
5.6.9
3.6.9
1.6.9
10.6.9';
my $regex = qr/([4-9]{1,1}\.([6-9]{1,1}\.([9]{1,1}$|[0-9]{2,}$)|[0-9]{2,}\.[0-9]{1,}$)|[0-9]{2,}\.[0-9]{1,}\.[0-9]{1,}$)/mp;
if ( $str =~ /$regex/g ) {
print "Whole match is ${^MATCH} and its start/end positions can be obtained via \$-[0] and \$+[0]\n";
# print "Capture Group 1 is $1 and its start/end positions can be obtained via \$-[1] and \$+[1]\n";
# print "Capture Group 2 is $2 ... and so on\n";
}
# ${^POSTMATCH} and ${^PREMATCH} are also available with the use of '/p'
# Named capture groups can be called via $+{name}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Perl, please visit: http://perldoc.perl.org/perlre.html