That was a lot of code... and I did not quite understand it all.
Could you identify the variable names that contain data that later turns out mangled?

$sth->execute( "NULL", $callid, "$fid", "$q->param($fid)" )

Here, and in other places too, the use of "" around variables is unnecessary.
At "$q->param($fid)" it is definitely wrong and will do something unexpected. Leave them out where you can.
There are problems with MySQL in particular where using them might speed up your statements, but that's hearsay for now, I haven't checked for sure.

There's a bit of a security risk where you are using CGI form input as database input.
You are using placeholders in the sql statement processing, that's good, it's doing at least something to prevent you from sql insertion;
but it would make me feel happier if you tested for some expected/unexpected content of that input before you pass it to the database.

Cheers, Sören

In reply to Re^7: escaping special characters in mysql queries by Happy-the-monk
in thread escaping special characters in mysql queries by Anonymous 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.