rename outfile before writing

Hi - I wrote the below program and I had one issue
all I am doing in the below program is I get the inputfile and get the file modifed date and substring in the inputfile and using it to generate outfilename,
I want to change the outfile name before I copy the content to the outfile.
so I updated outFileName variable but it did not work, it is still copying the content from testfile.txt to testfile2.txt
but not to the updated file name

use 5.006;
use strict;
use warnings;
use Pod::Usage;
use Getopt::Long;
use Cwd;
use DateTime;
use Time::Piece;
use File::Basename;

my $helpme = 0;
my $man = 0;
my $inputFile =  'C:\\temp\\testfile.txt';
my $outFileName = 'C:\\temp\\testfile2.txt';
my $filesubstr = '';
my $fileDate;
my $fileName;
my $fileContent;

open(INFILE, "<", $inputFile) || die "error";
open(OUTFILE, '>', $outFileName) or die "error";

while (<INFILE>) {
    my @lines = split /\~/, $_;
    $fileName = basename($inputFile, '.txt');  
    #print " filename: $fileName \n";    
    $filesubstr = substr($fileName, -5);
    $fileContent = $_;    
    $fileDate = POSIX::strftime("%Y:%m:%d %H:%M%S",localtime( ( stat $inputFile )[9]));  

$outFileName = "NewFile_".$fileDate."_".$filesubstr.".txt";

print OUTFILE $fileContent;

close INFILE;
close OUTFILE;

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$outFileName = "NewFile_".$fileDate."_".$filesubstr.".txt";
open(OUTFILE, '>', $outFileName) or die "error";
print OUTFILE $fileContent;

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shragiAuthor Commented:
Hi Ozo - I just figured it out and about to delete the question, but thanks for the quick response.
I wrote the same solution and it worked.

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