Re: XSS Preventing.

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Caner BULUT wrote:
> Hi Guys,
> 
>  
> 
> I have a question if you have any knowledge about this please let me know.
> 
>  
> 
> I getting data from a form with POST method like following.
> 
>  
> 
> $x = htmlentities($_POST['y']);
> 
> .
> 
>  
> 
> After getting all form daha I save them into DB, I used
> mysql_real_escape_string. 
> 
>  
> 
> I have an page which show the information that I have save into DB. But If I
> don't use html_entity_decode, there will encodding and charset problems. I
> can't set htmlentities charset parameters because this function does not
> have Turkish Charset support.
> 
>  
> 
> The question is that, after saving data into DB with using htmlentities, in
> the information page if I use html_entity_decode function still there is an
> 
> XSS risk or not? . html_entity_decode function get back all risk again?
> 
>  
> 
> Please help.
> 
>  
> 
> Thanks.
> 
> Caner.
> 
> 

Don't htmlentiies() before DB save.  In general:

- mysql_real_escape_string() before DB insertion

- htmlentities() before dispaly

-- 
Thanks!
-Shawn
http://www.spidean.com

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