Comments on: Creating a CAPTCHA in PHP with GD http://www.ultramegatech.com/blog/2008/12/creating-a-captcha-php/ Web development blog from UltraMega Tech. Wed, 10 Mar 2010 19:09:15 -0800 http://wordpress.org/?v=2.9.2 hourly 1 By: Steve http://www.ultramegatech.com/blog/2008/12/creating-a-captcha-php/comment-page-1/#comment-1133 Steve Mon, 08 Feb 2010 19:37:38 +0000 http://www.ultramegatech.com/blog/?p=139#comment-1133 The file that generates the image must be in a separate file from everything else. It is included as an image in your form HTML markup. So you should have at least 2 PHP files. The file that generates the image must be in a separate file from everything else. It is included as an image in your form HTML markup. So you should have at least 2 PHP files.

]]> By: ron http://www.ultramegatech.com/blog/2008/12/creating-a-captcha-php/comment-page-1/#comment-1132 ron Sun, 07 Feb 2010 17:09:26 +0000 http://www.ultramegatech.com/blog/?p=139#comment-1132 hi first,thanks for this tutorial. i have one problem: the captcha is generated and re-generated on each page refresh, which is good. but the form refuse to appear on the browser. i have puted all the code on the same file, am i right? what am i missing here? hope for help:) hi

first,thanks for this tutorial. i have one problem: the captcha is generated and re-generated on each page refresh, which is good.
but the form refuse to appear on the browser. i have puted all the code on the same file, am i right?

what am i missing here?

hope for help:)

]]> By: Steve http://www.ultramegatech.com/blog/2008/12/creating-a-captcha-php/comment-page-1/#comment-1114 Steve Tue, 12 Jan 2010 01:40:04 +0000 http://www.ultramegatech.com/blog/?p=139#comment-1114 Make sure there is no text before <?php in the beginning of captcha.php. This includes any whitespace. Make sure there is no text before <?php in the beginning of captcha.php. This includes any whitespace.

]]> By: beau http://www.ultramegatech.com/blog/2008/12/creating-a-captcha-php/comment-page-1/#comment-1113 beau Tue, 12 Jan 2010 01:24:03 +0000 http://www.ultramegatech.com/blog/?p=139#comment-1113 BTW gd is enabled and the ttf is uploaded. BTW gd is enabled and the ttf is uploaded.

]]> By: beau http://www.ultramegatech.com/blog/2008/12/creating-a-captcha-php/comment-page-1/#comment-1112 beau Tue, 12 Jan 2010 01:16:29 +0000 http://www.ultramegatech.com/blog/?p=139#comment-1112 Here is the error I am getting. I can't get the captcha to appear. I only see alt text and a broken image. Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/emsmcs/public_html/captcha.php:2) in /home/emsmcs/public_html/captcha.php on line 4 Warning: Cannot modify header information - headers already sent by (output started at /home/emsmcs/public_html/captcha.php:2) in /home/emsmcs/public_html/captcha.php on line 58 Warning: Cannot modify header information - headers already sent by (output started at /home/emsmcs/public_html/captcha.php:2) in /home/emsmcs/public_html/captcha.php on line 59 Warning: Cannot modify header information - headers already sent by (output started at /home/emsmcs/public_html/captcha.php:2) in /home/emsmcs/public_html/captcha.php on line 62 Here is the error I am getting. I can’t get the captcha to appear. I only see alt text and a broken image.

Warning: session_start() [function.session-start]: Cannot send session cache limiter – headers already sent (output started at /home/emsmcs/public_html/captcha.php:2) in /home/emsmcs/public_html/captcha.php on line 4

Warning: Cannot modify header information – headers already sent by (output started at /home/emsmcs/public_html/captcha.php:2) in /home/emsmcs/public_html/captcha.php on line 58

Warning: Cannot modify header information – headers already sent by (output started at /home/emsmcs/public_html/captcha.php:2) in /home/emsmcs/public_html/captcha.php on line 59

Warning: Cannot modify header information – headers already sent by (output started at /home/emsmcs/public_html/captcha.php:2) in /home/emsmcs/public_html/captcha.php on line 62

]]> By: anna http://www.ultramegatech.com/blog/2008/12/creating-a-captcha-php/comment-page-1/#comment-50 anna Tue, 23 Jun 2009 04:52:00 +0000 http://www.ultramegatech.com/blog/?p=139#comment-50 the problem is in this: line 42, 43 // "arial.ttf" can be replaced by any TTF font file stored in the same directory as the script imagettftext($image, mt_rand(14, 18), $angle, ($i * 18)-8, mt_rand(20, 25), $text, "arial.ttf", substr($code, ($i - 1), 1)); } replace arial.ttf with .ttf file you have and it will work :) the problem is in this:

line 42, 43

// “arial.ttf” can be replaced by any TTF font file stored in the same directory as the script
imagettftext($image, mt_rand(14, 18), $angle, ($i * 18)-8, mt_rand(20, 25), $text, “arial.ttf”, substr($code, ($i – 1), 1));
}

replace arial.ttf with .ttf file you have and it will work :)

]]> By: UltraMega http://www.ultramegatech.com/blog/2008/12/creating-a-captcha-php/comment-page-1/#comment-31 UltraMega Sun, 05 Apr 2009 17:36:00 +0000 http://www.ultramegatech.com/blog/?p=139#comment-31 Do the examples on this website work for you? What happens when you browse directly to captcha.php? Are there any errors displayed? If it's blank, there may be errors logged somewhere that will help find the problem. Do the examples on this website work for you? What happens when you browse directly to captcha.php? Are there any errors displayed? If it’s blank, there may be errors logged somewhere that will help find the problem.

]]> By: kcrazy http://www.ultramegatech.com/blog/2008/12/creating-a-captcha-php/comment-page-1/#comment-30 kcrazy Sun, 05 Apr 2009 11:35:36 +0000 http://www.ultramegatech.com/blog/?p=139#comment-30 i copied both files in the same directory but the image doesn't show up. Only the alt text and the broken image logo is shown. btw, GD is enabled. what could be the problem? Help needed ! i copied both files in the same directory but the image doesn’t show up. Only the alt text and the broken image logo is shown. btw, GD is enabled. what could be the problem? Help needed !

]]>