Images

[Jon Slaughter]

is it possible to do image manipulation with php that isn't low level?

I basically want to create some captchas manually (given a text string) but
I not sure if its possible to do. I want to ultimately do it in real time if
possible.

The idea is to turn the text into an image and then apply some image
processing(transformations that make it more random such as adding fuzz or
changing colors, etc..) to make it harder to hack.

How do websites normally go about creating them? Manually or offline?

Thanks,
Jon

[Jerry Stuckle]

Jon Slaughter wrote:

is it possible to do image manipulation with php that isn't low level?

I basically want to create some captchas manually (given a text string) but
I not sure if its possible to do. I want to ultimately do it in real time if
possible.

The idea is to turn the text into an image and then apply some image
processing(transformations that make it more random such as adding fuzz or
changing colors, etc..) to make it harder to hack.

How do websites normally go about creating them? Manually or offline?

Thanks,
Jon

Just google for CAPTCHA and PHP. There are several examples out there
already - and all do it real time. It's really not that bad.

--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
js*******@attglobal.net
==================

[Jon Slaughter]

"Jerry Stuckle" <js*******@attglobal.netwrote in message
news:Dq******************************@comcast.com. ..

Jon Slaughter wrote:

>is it possible to do image manipulation with php that isn't low level?

I basically want to create some captchas manually (given a text string)
but I not sure if its possible to do. I want to ultimately do it in real
time if possible.

The idea is to turn the text into an image and then apply some image
processing(transformations that make it more random such as adding fuzz
or changing colors, etc..) to make it harder to hack.

How do websites normally go about creating them? Manually or offline?

Thanks,
Jon

Just google for CAPTCHA and PHP. There are several examples out there
already - and all do it real time. It's really not that bad.

lol... I guess I should have done that first... looks quite easy. Although
I'm looking to do something original with the captchas that will require
more cycles... but atleast I have somewhere to start.

Thanks,
Jon

[-Lost]

Jon Slaughter wrote:

"Jerry Stuckle" <js*******@attglobal.netwrote in message
news:Dq******************************@comcast.com. ..

>Jon Slaughter wrote:

>>is it possible to do image manipulation with php that isn't low level?

I basically want to create some captchas manually (given a text string)
but I not sure if its possible to do. I want to ultimately do it in real
time if possible.

The idea is to turn the text into an image and then apply some image
processing(transformations that make it more random such as adding fuzz
or changing colors, etc..) to make it harder to hack.

How do websites normally go about creating them? Manually or offline?

Thanks,
Jon

Just google for CAPTCHA and PHP. There are several examples out there
already - and all do it real time. It's really not that bad.

lol... I guess I should have done that first... looks quite easy. Although
I'm looking to do something original with the captchas that will require
more cycles... but atleast I have somewhere to start.

With GD:

<?php
header('Content-Type: ' . image_type_to_mime_type(IMAGETYPE_JPEG)) . ';';
header('Content-Disposition: filename="' . $_SERVER['REMOTE_ADDR'] . '";');
$img = imagecreate(275,25);
$bg = imagecolorallocate($img, 102, 102, 153);
$fg = imagecolorallocate($img, 255, 255, 255);
imagefill($img, 0, 0, $bg);
$msg = " Your IP is {$_SERVER['REMOTE_ADDR']}";
imagestring($img, 10, 5, 5, $msg, $fg);
imagejpeg($img);
imagedestroy($img);
?>

Of course you would create a random CAPTCHA or whatever floats your boat.

--
-Lost
Remove the extra words to reply by e-mail. Don't e-mail me. I am
kidding. No I am not.

[Jon Slaughter]

"-Lost" <ma****************@techie.comwrote in message
news:5q******************************@comcast.com. ..

Jon Slaughter wrote:

>"Jerry Stuckle" <js*******@attglobal.netwrote in message
news:Dq******************************@comcast.com ...

>>Jon Slaughter wrote:
is it possible to do image manipulation with php that isn't low level?

I basically want to create some captchas manually (given a text string)
but I not sure if its possible to do. I want to ultimately do it in
real time if possible.

The idea is to turn the text into an image and then apply some image
processing(transformations that make it more random such as adding fuzz
or changing colors, etc..) to make it harder to hack.

How do websites normally go about creating them? Manually or offline?

Thanks,
Jon
Just google for CAPTCHA and PHP. There are several examples out there
already - and all do it real time. It's really not that bad.

lol... I guess I should have done that first... looks quite easy.
Although I'm looking to do something original with the captchas that will
require more cycles... but atleast I have somewhere to start.

With GD:

<?php
header('Content-Type: ' . image_type_to_mime_type(IMAGETYPE_JPEG)) . ';';
header('Content-Disposition: filename="' . $_SERVER['REMOTE_ADDR'] .
'";');
$img = imagecreate(275,25);
$bg = imagecolorallocate($img, 102, 102, 153);
$fg = imagecolorallocate($img, 255, 255, 255);
imagefill($img, 0, 0, $bg);
$msg = " Your IP is {$_SERVER['REMOTE_ADDR']}";
imagestring($img, 10, 5, 5, $msg, $fg);
imagejpeg($img);
imagedestroy($img);
?>

Of course you would create a random CAPTCHA or whatever floats your boat.

Yeah, I found some code but spent the last 2 hours trying to get gd to work
in zend ;/

seems adding the dll and library stuff just doens't work ;/ Works under
apache and php5 but not under the local php5 that zend uses ;/ really sucks
as it makes debugging difficult and can't seem to find the reason for it so
I guess I have to use the server to debug it ;/

(I downloaded the latest GD stuff with the php_gd2.dll and added the
extensions tag in the php.ini in zend but no luck ;/ can't even seem to find
the error reporting... but just can't get it to show up in phpinfo())

Thanks,
Jon

[-Lost]

Jon Slaughter wrote:

"-Lost" <ma****************@techie.comwrote in message
news:5q******************************@comcast.com. ..

>Jon Slaughter wrote:

>>"Jerry Stuckle" <js*******@attglobal.netwrote in message
news:Dq******************************@comcast.co m...
Jon Slaughter wrote:
is it possible to do image manipulation with php that isn't low level?
>
I basically want to create some captchas manually (given a text string)
but I not sure if its possible to do. I want to ultimately do it in
real time if possible.
>
The idea is to turn the text into an image and then apply some image
processing(transformations that make it more random such as adding fuzz
or changing colors, etc..) to make it harder to hack.
>
How do websites normally go about creating them? Manually or offline?
>
Thanks,
Jon
Just google for CAPTCHA and PHP. There are several examples out there
already - and all do it real time. It's really not that bad.

lol... I guess I should have done that first... looks quite easy.
Although I'm looking to do something original with the captchas that will
require more cycles... but atleast I have somewhere to start.

With GD:

<?php
header('Content-Type: ' . image_type_to_mime_type(IMAGETYPE_JPEG)) . ';';
header('Content-Disposition: filename="' . $_SERVER['REMOTE_ADDR'] .
'";');
$img = imagecreate(275,25);
$bg = imagecolorallocate($img, 102, 102, 153);
$fg = imagecolorallocate($img, 255, 255, 255);
imagefill($img, 0, 0, $bg);
$msg = " Your IP is {$_SERVER['REMOTE_ADDR']}";
imagestring($img, 10, 5, 5, $msg, $fg);
imagejpeg($img);
imagedestroy($img);
?>

Of course you would create a random CAPTCHA or whatever floats your boat.

Yeah, I found some code but spent the last 2 hours trying to get gd to work
in zend ;/

seems adding the dll and library stuff just doens't work ;/ Works under
apache and php5 but not under the local php5 that zend uses ;/ really sucks
as it makes debugging difficult and can't seem to find the reason for it so
I guess I have to use the server to debug it ;/

(I downloaded the latest GD stuff with the php_gd2.dll and added the
extensions tag in the php.ini in zend but no luck ;/ can't even seem to find
the error reporting... but just can't get it to show up in phpinfo())

Damn. Wish I could help mate, but I have never used Zend.

I wouldn't have the slightest idea where to start.

--
-Lost
Remove the extra words to reply by e-mail. Don't e-mail me. I am
kidding. No I am not.

[Tyno Gendo]

-Lost wrote:

Jon Slaughter wrote:

>Yeah, I found some code but spent the last 2 hours trying to get gd to
work in zend ;/

seems adding the dll and library stuff just doens't work ;/ Works
under apache and php5 but not under the local php5 that zend uses ;/
really sucks as it makes debugging difficult and can't seem to find
the reason for it so I guess I have to use the server to debug it ;/

(I downloaded the latest GD stuff with the php_gd2.dll and added the
extensions tag in the php.ini in zend but no luck ;/ can't even seem
to find the error reporting... but just can't get it to show up in
phpinfo())

Damn. Wish I could help mate, but I have never used Zend.

I wouldn't have the slightest idea where to start.

Don't know if it's feasible for your project, but we use
http://recaptcha.net/whyrecaptcha.html on one of our latest sites.

It's free so long as you're not getting 1000's of sign ups a day :)

Just sign up, get a private/public key, add a bit of code to your form,
use their sample PHP for the backend and you're away, and you help
translate old books in the process using the captcha words :-p