The form is probably submitted using UTF-8 character encoding, which uses 2 bytes for latin accented characters.

You have basically 2 ways of dealing with this: only allow submissions in latin-1 (which is the default perl character encoding) using the "accept-charset" property on the <form> tag, or make sure perl knows about your encoding: 

use Encode qw(decode);
my $real_string = decode("utf8",$input_string); #assumes $input string
+ is in UTF-8 encoding
print "string is ".lenght($real_string)." characters\n"; # length() no
+w interprets $real_string in character instead of bytes.

[download]
There is a LOT of subtle stuff going on here. You should probably read Encode first. Maybe.
"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re: How to count string length with latin characters? by Joost
in thread How to count string length with latin characters? by newblet

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.