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Posted by frizzle on 03/18/06 03:16
ColdShine wrote:
> frizzle in news:1142640199.152903.92170@p10g2000cwp.googlegroups.com wrote:
>
> > $_GET['artile'] looks like this: /2006/03/lorem_ipsum
> >
> > $locationinfo = explode('/', trim( $_GET['article'] , '/') );
> >
> > list( $article_year, $article_month, $article_url ) = $locationinfo;
> >
> > echo '<br>year: '.(($article_year === NULL)? 'null': $article_year);
> > echo '<br>month: '.(($article_month === NULL)? 'null': $article_month);
> > echo '<br>article: '.(($article_url === NULL)? 'null': $article_url);
> >
> > The weird thing is, if $_GET['article'] is empty, $article_year isn't
> > NULL, but the rest is. This doesn't make any sense to me ...
>
> When there's no match for the specified delimiter, explode() returns an
> array with 1 item (the entire source string). So, assigning this to
> list(...) results in the first list() argument being assigned the value of
> the 1st (and only) item in the array, and the remaining list() arguments are
> set to null (or simply still unset? I don't know).
>
> So, as in your case, you get trim($_GET['article'], '/') == ''; explode('/',
> '') returns array(''), and list($a_y, $a_m, $a_u) translates into $a_y = '';
> $a_m = null, $a_u = null.
>
> --
> ColdShine
>
> "Experience is a hard teacher: she gives the test first, the lesson
> afterwards." - Vernon Sanders law
So validating it as follows would be just as safe?
echo '<br>year: '.(($article_year === '' )? 'null': $article_year);
echo '<br>month: '.(($article_month === NULL)? 'null': $article_month);
echo '<br>article: '.(($article_url === NULL)? 'null': $article_url);
Frizzle.
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