Corion's approach is the correct one. However, since you asked using a regex on the string and have still not shown that you have learned How to ask better questions using Test::More and sample data, here is one final demonstration.

use strict;
use warnings;

use Test::More tests => 1;

my $response1 = <<EOT;
Cache-Control: no-cache, no-store
Connection: close
Date: Fri, 26 Mar 2021 02:11:16 GMT
Pragma: no-cache
Server: nginx
Vary: Accept-Encoding
Content-Type: application/json
Expires: 0
Client-Date: Fri, 26 Mar 2021 02:11:16 GMT
Client-Peer: 10.10.1.32:8080
Client-Response-Num: 1
Client-Transfer-Encoding: chunked
Expect-Ct: report-uri="https://org.extract.net", max-age=0
Link: <https://sso.myorg.com/api/v5/myids?limit=200>; rel="self"
Link: <https://sso.myorg.com/api/v5/myids?after=200xxxxxxxxxxxxxxxxx&l
+imit=200>; rel="next"
EOT

my $want = '<https://sso.myorg.com/api/v5/myids?after=200xxxxxxxxxxxxx
+xxxx&limit=200>; rel="next"';

my @linkheader = $response1 =~ /^Link: (.*"next")/mg;
is $linkheader[0], $want;

[download]

🦛

In reply to Re: Perl to collect "Link" values contains "next" by hippo
in thread Perl to collect "Link" values contains "next" by chandantul

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.