You're checking the length of the result of an 'or' between two calls to the param() sub. There is no context in your post, but I don't think that's what you want. Look closely at how your parentheses match up: 
(param('tele') || param('mobile'))

[download]

Do you want, instead, to check that one (or both) of the params "mobile" and "tele" are at least one character long?

If so, try this: 

elsif( length(param('tele')) || length(param('mobile')) )

[download]
If not, please ask again, but be clear in your question what it is that you're looking for, and exactly how the code you have so far is not doing what you want. (For more on this, have a look at How do I post a question effectively?) It is difficult to tell what you're trying to ask, here.

Welcome to the Monastery, andrew - I hope you find what you're looking for here.

In reply to Re: Checking for empty CGI params; this isn't working by mrbbking
in thread Checking for empty CGI params; this isn't working by andrew

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.