Hi Oukz,
Really, aitap's wisdom for me is the way to go, however, if I may suggest using here-document like so: 

use warnings;
use strict;

my $first_name = "James";
my $company    = "SoftLayer";

my $letter = << "COMPANY_LETTER";
Hello $first_name. 

I'm writing on behalf of $company ....

COMPANY_LETTER

my $outfile = "new.txt";

open my $fh, '>', $outfile or die "Can't open file: $!";

print $fh $letter;

close $fh or die "can't close file: $!";

[download]

If you tell me, I'll forget.
If you show me, I'll remember.
if you involve me, I'll understand.
--- Author unknown to me

In reply to Re: Reading from/writing to files with variables substitutions by 2teez
in thread Reading from/writing to files with variables substitutions by Qukz

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.