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Can I modify Captcha parameters (height, width, color)?
 
mdesign
Posted: 01 March 2007 08:24 AM   [ Ignore ]  
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I’m using a captcha on a contact form and it’s kicking out this image file:

<img src="http://www.site.com/images/captchas/1174765150.29.jpg" width="140" height="30" style="border:0;" alt=" " />

Any reason that’s 140x30? I would love to change the height of that (and the color, if possible) but don’t see where I can tweak anything, either through parameters or otherwise. Has anyone ever modified the Captchas?

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Ingmar Greil
Posted: 01 March 2007 09:23 AM   [ Ignore ]   [ # 1 ]  
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No particular reason, I should think, but it’s hardcoded in EE. See core.functions.php, around line 1690:

$font_face      = "texb.ttf";
$font_size      = 16;

$expiration = 60*60*2;  // 2 hours

$img_width      = 140;  // Image width
$img_height     = 30;   // Image height

Now, you can either hack that or (preferred), come up with an extension. I think create_captcha_start would be appropriate.

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Lisa Wess
Posted: 01 March 2007 09:27 AM   [ Ignore ]   [ # 2 ]  
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You might also look through the DevBlog entries for the Advanced Captcha extension, which has more options as well as showing how you might modify captchas without hacking. =)

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mdesign
Posted: 01 March 2007 09:36 AM   [ Ignore ]   [ # 3 ]  
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I definitely do not want to hack anything. I also haven’t written an extension yet - this might be a good exercise.

Thank you for pointing that out, Ingmar!

Thanks Lisa, I’ll look around for that, and/or try writing my first extension.

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TechWench
Posted: 01 March 2007 10:29 AM   [ Ignore ]   [ # 4 ]  
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The specific blog entry is here:

http://www.pmachine.com/developers/blog/1663/

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mdesign
Posted: 01 March 2007 10:42 AM   [ Ignore ]   [ # 5 ]  
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Found, downloaded, installed, tweaked just a little to my taste (width/height modifications), and working fine.

Thanks - I didn’t know Advanced Captcha existed, but it’s great!

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Lisa Wess
Posted: 01 March 2007 10:44 AM   [ Ignore ]   [ # 6 ]  
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Thanks, TechWench! I’ve been flat out here, sorry about not including the link.  Glad you got it working, Ryan! =)

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Aegir Hallmundur
Posted: 18 April 2007 09:18 AM   [ Ignore ]   [ # 7 ]  
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http://www.pmachine.com/developers/blog/1663/

Doesn’t exist anymore. I can’t find it on ellislab or expressionengine.com. Anyone know where the article went to?

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Lisa Wess
Posted: 18 April 2007 09:22 AM   [ Ignore ]   [ # 8 ]  
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See here =)

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Derek Allard
Posted: 18 April 2007 12:29 PM   [ Ignore ]   [ # 9 ]  
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For completeness, the link to the actual add-on page is http://expressionengine.com/downloads/details/advanced_captcha/

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brandonrichards
Posted: 21 May 2009 01:56 PM   [ Ignore ]   [ # 10 ]  
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Is this extension still relevant to the latest EE?

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Ingmar Greil
Posted: 21 May 2009 02:00 PM   [ Ignore ]   [ # 11 ]  
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It should still work, and, yes, it still modifies the original CAPTCHA that EE creates.

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brandonrichards
Posted: 21 May 2009 02:17 PM   [ Ignore ]   [ # 12 ]  
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Thanks for the response, So is there a way to modify the colors? All I really want is to modify the color of the original captcha to something other than the red.

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Ingmar Greil
Posted: 21 May 2009 02:23 PM   [ Ignore ]   [ # 13 ]  
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I’ll have to give you the same advice I gave Ryan back then: hack EE, or come up with an extension. If the former is an option for you, take a look at core.functions.php, line 1835 and following:

$bg_color$bg_color   = ImageColorAllocate($im, 255, 255, 255);
$border_color        = ImageColorAllocate($im, 153, 102, 102);
$text_color          = ImageColorAllocate($im, 204, 153, 153);
$grid_color          = imagecolorallocate($im, 255, 182, 182);
$shadow_color        = imagecolorallocate($im, 255, 240, 240);
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brandonrichards
Posted: 21 May 2009 02:30 PM   [ Ignore ]   [ # 14 ]  
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Alright I for some reason thought that the advanced captcha allowed one to do that. Thanks Ingmar, more than helpful!

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Ingmar Greil
Posted: 21 May 2009 02:33 PM   [ Ignore ]   [ # 15 ]  
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Very good smile Closing this legacy thread now; please don’t hesitate to post again as needed.

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