Special Chars on Form to Image (GD), not displaying properly.

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Re: Special Chars on Form to Image (GD), not displaying properly.

On Wed, Feb 22, 2006 at 12:38:19PM +0800, Louie Miranda wrote:
> Im having a trouble displaying special characters like #, + on GD (Jpeg) -
> Image. When i typed in on the form +88 it only shows 88 and the + sign is
> missing.
>
> My code:
> > ..
> $line_1_1 = urldecode($_GET["line_1_1"]);

You dont want to urldecode() the $_GET vars. PHP already does this
step.

See what happens with:

var_dump(urldecode($_GET['line_1_1']));
var_dump($_GET['line_1_1']);

> ...
> I made a couple of tests and found this variables.
>
> The data that will be pass: +88and#
> Data from the url (address box): &line_1_1=%2B88and%23
> Image displayed: 88and - only missing + and #
>
> What could i be missing?

Well if you dont use the urldecode() as mentioned above, the only
reasons i can think of (assuming + will display properly now):

- The font doesn't have a definition for #
- The area isn't big enough so # is getting truncated.

Curt.
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Re: Special Chars on Form to Image (GD), not displaying properly.

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Re: Special Chars on Form to Image (GD), not displaying properly.

On Wed, Feb 22, 2006 at 01:12:00PM +0800, Louie Miranda wrote:
> Please read below..
>
> > Im having a trouble displaying special characters like #, + on GD (Jpeg) -
> > > Image. When i typed in on the form +88 it only shows 88 and the + sign
> > is
> > > missing.
> > >
> > > My code:
> > > > > > ..
> > > $line_1_1 = urldecode($_GET["line_1_1"]);
> >
> > You dont want to urldecode() the $_GET vars. PHP already does this
> > step.
> >
> > See what happens with:
> >
> > var_dump(urldecode($_GET['line_1_1']));
> > var_dump($_GET['line_1_1']);
> >
>
> I tested this not on a GD/Image, but on a plain form and plain var_dump.
> The results:
>
> string(1) " "
> string(1) "+"
>
> So, now if i even make a urldecode it also disappers. I think the problem
> is when i typed in + on the user input via form. The url converts it
> to %2B which
> i think is a space. Because as for my example (seen thru the url):
>
> +88and#
> When displayed on an image becomes..
> 88and
>
> Now, if i made this
>
> +88+and#
> It displays..
> 88 and#

this is where i think your confused, the problem with your original
code is you are ending up urldecoding things twice thus thinking
that %2B == a space.

consider:
echo urlencode(' '); # '+'
echo urlencode('+'); # '%2B'

echo urldecode(' '); # ' '
echo urldecode('+'); # ' '
echo urldecode('%2B'); # '+'

if your url is:
http://server.com/?foo=%2B88an%23

then in php if you do:
echo $_GET['foo'];

you will get '+88and#'

if your url is:
http://server.com/?foo=+88and#

then in php if you do:
echo $_GET['foo'];

you will get: ' 88and'

>
> It converts + to space. Now, how could i filter this properly?

Now given what I said and you have a form defined as: