Don't think of it as removing the special characters. Think of it as keeping the safe/useful characters. It is a subtle thing but you'll be well served in the future if you keep that attitude. You can spend all day adding more and more special characters or you can just removed everything that you aren't sure is valid. You'll always miss things but it is easier to allow one extra thing you missed than clean up your database or hacked server when you allowed something you shouldn't have.
As an example, to keep only upper case letters and numbers, you might do: $scalar =~ s/[^A-Z0-9]+//g; which removes from the string every character that isn't in the A-Z or 0-9 range.
--
$you = new YOU;
honk() if $you->love(perl)
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|
