You're not using param() correctly.
You have passed 'id=$id' to your CGI. Therefore, you can expect param('id') to return the value contained in $id.
If you had this in source.cgi: 
$testo=qq(<a href="/cgi-bin/a_test/test.cgi?id=$id&fred=wombat">$testo
+</a>);

[download]
Then you could do something like this: 
foreach(param())
{
    print "$_ = ".param($_)."<br>\n";
}

[download]
And you would get: 
id = [whatever was in $id]
fred = wombat

[download]

This should demonstrate the two ways to call param().

In reply to Re: passing param value throughout GET method by leighsharpe
in thread passing param value throughout GET method by frasco

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.