What is this expression matching on??

use Fcntl qw(:DEFAULT :flock); 
sub writeLog { 
    my $xml     = $_[0]; # pass the xml filename to the sub
    my $simple  = XMLin($xml);
    my $date    = localtime(time);
    my $groups  = $simple->{'Group'};
    my $search  = param('to_group');
    my $myname  = param('YourName');
    my $mynum   = param('YourNumber');
    my $logfile = 'AlphaPageLog.txt'; 
    # you should verify that the passed-in form fields have defined values     
    # use a lexical var for the filhandle instead of a bareword
    # and use the 3 arg form of open
    open my $LOG, '>>', $logfile
      or die "Cannot open '$logfile': $!";
    
    # in a cgi env, you should always lock a writable filhandle
    flock($LOG, LOCK_EX) or die "Cannot lock $logfile $!\n";
    seek($LOG, 0, SEEK_END) or die "Cannot seek - $!\n"; 
    foreach my $group ( @{$groups} ) {
        #print $LOG "$date|$group->{'Name'}|$group->{'Pager'}|$myname|$mynum|$body\n" if $group->{'Pager'} =~ m/\Q$search\E/gi;
        print $LOG "$search\n";
    }
    
    flock($LOG, LOCK_UN) or die "Cannot unlock $logfile - $!\n";
    close ($LOG);
}

                                              

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use Fcntl qw(:DEFAULT :flock);
    
sub writeLog {
    
    my $xml     = $_[0]; # pass the xml filename to the sub
    my $simple  = XMLin($xml);
    my $date    = localtime(time);
    my $groups  = $simple->{'Group'};
    my $search  = param('to_group');
    my $myname  = param('YourName');
    my $mynum   = param('YourNumber');
    my $logfile = 'AlphaPageLog.txt';
    
    # you should verify that the passed-in form fields have defined values    
    
    # use a lexical var for the filhandle instead of a bareword
    # and use the 3 arg form of open
    open my $LOG, '>>', $logfile
      or die "Cannot open '$logfile': $!";
    
    # in a cgi env, you should always lock a writable filhandle
    flock($LOG, LOCK_EX) or die "Cannot lock $logfile $!\n";
    seek($LOG, 0, SEEK_END) or die "Cannot seek - $!\n";
    
    foreach my $group ( @{$groups} ) {
        #print $LOG "$date|$group->{'Name'}|$group->{'Pager'}|$myname|$mynum|$body\n" if $group->{'Pager'} =~ m/\Q$search\E/gi;
        print $LOG "$search\n";
    }
    
    flock($LOG, LOCK_UN) or die "Cannot unlock $logfile - $!\n";
    close ($LOG);
}

                                              

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