Well, we can make guesses at what you mean. But a little sample code like the following would allow us to answer your actual question rather than any one of the many we could invent for you.

use strict;
use warnings;

my $temp = 'Plugh';
my $str = <<STR;
To %ad or not to %ad,
that is the question.
Oh %ad on you.
STR

$str =~ s/%ad/$temp/g;
print $str;

[download]

Prints:

To Plugh or not to Plugh,
that is the question.
Oh Plugh on you.

[download]

If that isn't the answer to the question you were intending, please alter the sample code to illustrate what you really want to know. You ought to read I know what I mean. Why don't you? BTW. It was written for you.

Update: fix cut and paste problem

DWIM is Perl's answer to Gödel

In reply to Re: Replacing strings by GrandFather
in thread Replacing strings by perl_99_monk

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.