use strict;
my $str = 'Jan 10 11:08:21 server kernel: martian source 192.168.12.197 from 192.168.12.198, on dev eth0
Jan 11 10:12:45 server kernel: ll header: 08:00:00:00:45:00:01:00:00:00:40:00:40:11:9f:11:c0:a8:0c:c6:c0:a8:0c:c5
Jan 12 10:12:45 server kernel: lo: Disabled Priacy Extensions
Jan 13 10:12:45 server kernel: lo: Disabled Priacy Extensions
Jan 14 10:12:45 server kernel: lo: Disabled Priacy Extensions
Jan 15 10:12:45 server kernel: lo: Disabled Priacy Extensions
Jan 16 10:12:45 server kernel: lo: Disabled Priacy Extensions
Jan 17 10:12:45 server kernel: lo: Disabled Priacy Extensions
Jan 18 10:12:45 server kernel: lo: Disabled Priacy Extensions
Jan 19 10:12:45 server kernel: lo: Disabled Priacy Extensions
Jan 20 10:12:45 server kernel: lo: Disabled Priacy Extensions
Jan 21 10:12:45 server kernel: lo: Disabled Priacy Extensions
Jan 22 10:12:45 server kernel: lo: Disabled Priacy Extensions
Jan 23 10:12:45 server kernel: lo: Disabled Priacy Extensions
Jan 23 10:12:45 server kernel: lo: Disabled Priacy Extensions
Jan 24 10:12:45 server kernel: lo: Disabled Priacy Extensions
Jan 25 11:08:21 server kernel: martian source 192.168.12.197 from 192.168.12.198, on dev eth0
Jan 25 10:12:45 server kernel: ll header: 08:00:00:00:45:00:01:00:00:00:40:00:40:11:9f:11:c0:a8:0c:c6:c0:a8:0c:c5
Jan 26 11:08:21 server kernel: martian source 192.168.12.197 from 192.168.12.198, on dev eth0
Jan 26 10:12:45 server kernel: ll header: 08:00:00:00:45:00:01:00:00:00:40:00:40:11:9f:11:c0:a8:0c:c6:c0:a8:0c:c5
Jan 27 10:12:45 server kernel: lo: Disabled Priacy Extensions
Jan 28 11:08:21 server kernel: martian source 192.168.12.197 from 192.168.12.198, on dev eth0
Jan 28 10:12:45 server kernel: ll header: 08:00:00:00:45:00:01:00:00:00:40:00:40:11:9f:11:c0:a8:0c:c6:c0:a8:0c:c5';
my $regex = qr/.*martian.*source.*\n.*/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