captcha in e107

[Jimmi08]

Hi, you may know this is how I get this but I could forget it soon :)

At first - that not readable code is intention. Those fonts are used random:

The only readable one is, so I hardcoded it :
$secureimg['font'] = "crazy_style.ttf";

Another option is to save the needed font (they use Arial at codepen) as those 3 fonts.

Now coloring...

After header("Content-type: image/{$type}"); in secure_img_handler.php or look for imagettftext in that file

		if(!empty($fontFile))
		{
			$text = $code;  //just not mess variables
		        $font_size = $secureimg['size'];
			$y = $secureimg['y']; 
			$height = 35;  //where is this set?  it is height of image, very hard to centered vertically, 
			$font = $fontFile;
  
			for ($i = 0; $i < strlen($text); $i++)
			{
				// Set a random text color
				$text_color = imagecolorallocate($image, rand(0, 255), rand(0, 255), rand(0, 255));

				// Calculate the position to display the current character
				$x = $i * $font_size * 0.9; 
                                // 0.9  - control the spacing, but width of image is defined somewhere so 1.1 is max
				$y = $height / 2 + $font_size / 2;

				// Add the current character to the image
				imagettftext($image, $font_size, 0, $x, $y, $text_color, $font, $text[$i]);
			}
			//original code
			//imagettftext($image, $secureimg['size'],$secureimg['angle'], $secureimg['x'], $secureimg['y'], $text_color, $fontFile, $code);
		}
		else
		{
			imagestring ($image, 5, 12, 2, $code, $text_color);
		}

it is in the render() method and it can be overridden with the plugin (I used it in recaptcha plugin) - to avoid the change of core files.
But those available fonts are real issue.

I will wait for reactions to your topic on e107, But the spams know to read very easy captcha. There should be next way - like to use fake email field or similar stuff.