Re: str_replace problem

[Robin Vickery <robinv@xxxxxxxxx>]

On Wed, 20 Oct 2004 01:02:12 -0500, Chris Ditty <cditty@xxxxxxxxx> wrote:
> Hi all.  I'm trying to do a little code snippets page for a site I am
> working on.  I figured it would be simple enough.  I would do a
> str_replace and replace the various html codes with the ascii
> eqivulant.  Unfortunately, it is not working as expected.  Can anyone
> help with this?
> 
> This is what I am using.
> $snippetCode = str_replace("\n", "<br>", $snippet['snippetCode']);
> $snippetCode = str_replace("<", "&gt;", $snippetCode);
> $snippetCode = str_replace(">", "&lt;", $snippetCode);
> $snippetCode = str_replace("&", "&amp;", $snippetCode);
> 
> This is what is in $snippet['snippetCode'].
> ?><pre><? print_r($ArrayName); ?></pre><?
> 
> This is what is showing on the web page.
> ?&lt;&gt;pre&lt;&gt;? print_r($ArrayName); ?&lt;&gt;/pre&lt;&gt;?

Ok, first off there are builtin functions to do this kind of thing:

  http://www.php.net/htmlspecialchars 
  http://www.php.net/nl2br

Secondly, think about what your code is doing, and the order that it's
doing the replacements.

The first thing you're doing is replacing the newlines with <br> tags.

The second and third things you're doing will disable all the tags
including the <br> tags you've just inserted, by replacing '<' with
&lt; and '> with &gt html entities;

The fourth thing you're doing is disabling the html entities by
replacing '&' with &amp; including the entities you've just inserted
as steps two and three.

  -robin

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