Comments on: Implementing CAPTCHA using PHP http://www.einternals.com/blog/web-development/php/implementing-captcha-using-php Not Just another technology blog Tue, 27 Jul 2010 07:18:20 +0000 http://wordpress.org/?v=2.8.1 hourly 1 By: Wasilij http://www.einternals.com/blog/web-development/php/implementing-captcha-using-php/comment-page-1#comment-702 Wasilij Wed, 19 Nov 2008 11:54:12 +0000 http://www.einternals.com/blog/php/implementing-captcha-using-php#comment-702 hi there, well what if you have a form with you captcha , and for example per day there will be about 1000 users , where user access your captcha code every 3 sec , i suppose that if one user will try to enter captcha at the same time throught two browsers your captcha won't work in the first one :D hi there, well what if you have a form with you captcha , and for example per day there will be about 1000 users , where user access your captcha code every 3 sec , i suppose that if one user will try to enter captcha at the same time throught two browsers your captcha won’t work in the first one :D

]]> By: pavan http://www.einternals.com/blog/web-development/php/implementing-captcha-using-php/comment-page-1#comment-701 pavan Fri, 25 Jul 2008 20:41:04 +0000 http://www.einternals.com/blog/php/implementing-captcha-using-php#comment-701 Hii kiran, I've installed WAMP server, yeah the problem has been solved..thnx for d come back, where can i get gdf files?? u've provided only 3, if i wanna download more,where can i get them? how can i add capital letters and symbols to the captcha? Many thanks, Pavan.P Hii kiran,
I’ve installed WAMP server, yeah the problem has been solved..thnx for d come back,
where can i get gdf files?? u’ve provided only 3, if i wanna download more,where can i get them?
how can i add capital letters and symbols to the captcha?
Many thanks,
Pavan.P

]]> By: kiranvj http://www.einternals.com/blog/web-development/php/implementing-captcha-using-php/comment-page-1#comment-700 kiranvj Fri, 25 Jul 2008 04:34:12 +0000 http://www.einternals.com/blog/php/implementing-captcha-using-php#comment-700 I doubt there is some issue with the installation of apache server. I recommend using WAMP http://www.wampserver.com/en/ I doubt there is some issue with the installation of apache server. I recommend using WAMP http://www.wampserver.com/en/

]]> By: pavan http://www.einternals.com/blog/web-development/php/implementing-captcha-using-php/comment-page-1#comment-699 pavan Thu, 24 Jul 2008 20:36:20 +0000 http://www.einternals.com/blog/php/implementing-captcha-using-php#comment-699 Hii Kiran,, The image is not getting displayed in the page which i embed this captcha. I'm getting an error like, " An unhandled win32 exception occured in httpd.exe[4392]." why is dat happening so? u told tht GD library was not installed, if so how to install it.. please help me. Many Thanks, Pavan.P. Hii Kiran,,
The image is not getting displayed in the page which i embed this captcha.
I’m getting an error like, ” An unhandled win32 exception occured in httpd.exe[4392].”
why is dat happening so? u told tht GD library was not installed, if so how to install it.. please
help me.
Many Thanks,
Pavan.P.

]]> By: Matt http://www.einternals.com/blog/web-development/php/implementing-captcha-using-php/comment-page-1#comment-36 Matt Sun, 23 Mar 2008 17:43:54 +0000 http://www.einternals.com/blog/php/implementing-captcha-using-php#comment-36 Captcha is best protect Captcha is best protect

]]> By: kiranvj http://www.einternals.com/blog/web-development/php/implementing-captcha-using-php/comment-page-1#comment-7 kiranvj Sun, 10 Feb 2008 16:35:35 +0000 http://www.einternals.com/blog/php/implementing-captcha-using-php#comment-7 If gd is installed your gd section in phpinfo will look like GD Support enabled GD Version bundled (2.0.28 compatible) FreeType Support enabled FreeType Linkage with freetype GIF Read Support enabled GIF Create Support enabled JPG Support enabled PNG Support enabled WBMP Support enabled XBM Support enabled If gd is installed your gd section in phpinfo will look like

GD Support enabled
GD Version bundled (2.0.28 compatible)
FreeType Support enabled
FreeType Linkage with freetype
GIF Read Support enabled
GIF Create Support enabled
JPG Support enabled
PNG Support enabled
WBMP Support enabled
XBM Support enabled

]]> By: kiranvj http://www.einternals.com/blog/web-development/php/implementing-captcha-using-php/comment-page-1#comment-6 kiranvj Sun, 10 Feb 2008 16:28:31 +0000 http://www.einternals.com/blog/php/implementing-captcha-using-php#comment-6 Hi Abhi, You are getting that error because GD is not installed in your webserver. You can check if GD is installed by using phpinfo() function. Open a new PHP page and write this <pre> <?php phpinfo(); ?> </pre> Call this page from the browser. Check under the section gd for more details. If gd is not installed there wont be any section named gd. another method to check if gd is installed is <pre> <?php if (extension_loaded('gd') && function_exists('gd_info')) { echo "It looks like GD is installed"; } ?> </pre> Hope these helps Hi Abhi,
You are getting that error because GD is not installed in your webserver.
You can check if GD is installed by using phpinfo() function. Open a new PHP page and write this 

<?php phpinfo(); ?>

Call this page from the browser. Check under the section gd for more details. If gd is not installed there wont be any section named gd.

another method to check if gd is installed is 

<?php
if (extension_loaded('gd') && function_exists('gd_info')) {
    echo "It looks like GD is installed";
}
?>

Hope these helps

]]> By: abhi http://www.einternals.com/blog/web-development/php/implementing-captcha-using-php/comment-page-1#comment-5 abhi Sun, 10 Feb 2008 10:47:53 +0000 http://www.einternals.com/blog/php/implementing-captcha-using-php#comment-5 thnks.. but when i tried to run the captcha.php, it gives error-- <b>Fatal error</b>: Call to undefined function imagecreatefrompng() in <b>C:\Program Files\Apache Group\Apache2\htdocs\captchas\test4\captcha\captcha.php</b> on line <b>21</b> and if try to run index.php it'll not display image.. why this is so.. plz reply.. thnks..

but when i tried to run the captcha.php, it gives error–

Fatal error: Call to undefined function imagecreatefrompng() in C:\Program Files\Apache Group\Apache2\htdocs\captchas\test4\captcha\captcha.php on line 21

and if try to run index.php it’ll not display image..
why this is so..
plz reply..

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