Add use warnings; use strict; to the start of your code. After you have resolved the errors that that generates, and if you still have a problem, ask the question again with the modified code.

My guess is that $tier and $code1 are going out of scope so when you get to the assignment new variables are created and have undefined values.

Note that in addition to the scoping problem if($code1 = 0) should probably be if($code1 == 0). For purposes of testing a value for @contents would be nice. _$tier_$code has to be written _${tier}_$code or Perl will think the variable is %tier_.

use strict;
use warnings;
my $temp;
my $code;
my $info;
my $count = 0;

my @contents = ('WEB');

my $length = scalar@contents;
for(my $i=0;$i<=$length;$i++) {
        my $code1;
        my $tier;
        my $severity;
        chomp($contents[$i]);
        if($contents[$i] =~ /\w+=(\d+)/){
                $code = $1;
                $code1 = $code;
                chomp($contents[$i+1]);
                $info = $contents[$i+1];
                substr($info,0,5) = "";
                $temp = substr($code ,0,1);
                #print "$temp --> code\n";
                if($temp == 1) {
                        $tier = "WEB";
                }
                if($temp == 2) {
                        $tier = "APP";
                }
                if($temp == 3) {
                        $tier = "DB";
                }
                if($code1 != 0) {
                        $severity = 1;
                }
                if($code1 == 0) {
                        $severity = 5;
                }
                #print "$code1 --> $tier\n";
                my $message = "<event id=\"ALERT_${tier}_$code1\" sour
+ce=\"APP\">";
                print "$message --messgae\n";
       }
}

[download]

Updated to provide sample code
DWIM is Perl's answer to Gödel

In reply to Re: the variable is not getting assigned by GrandFather
in thread the variable is not getting assigned by s_gaurav1091

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