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POAdd additional noise to Captcha image?
 

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  1. POAdd additional noise to Captcha image?
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    <p>I have this simple captcha script from online. I like it, and I edited it to suit my site, but was wondering if someone could edit it to add some random lines on the captcha itself as it is somewhat too simple.</p> <p>I did find tutorials on how to do it but it was not working for me.</p> <p>Here is the simple captcha script; I would love to modify it to have some random lines appear on the captcha:</p> <pre><code> $width = 150; $height = 24; $length = 5; $font = 'caviardreams.ttf'; $font_size = 14; $bg_color = array(245, 245, 245); $chars = 'ABCDEFGHKMNPQRSTUVWXYZ23456789'; session_start(); //putenv('GDFONTPATH=' . realpath('.')); $img = imagecreatetruecolor($width, $height); $bkgr = imagecolorallocate($img, $bg_color[0], $bg_color[1], $bg_color[2]); imagefilledrectangle($img, 0, 0, $width, $height, $bkgr); $code = ''; for($i = 0; $i &lt; $length; $i++) { $code .= $chr = $chars[mt_rand(0, strlen($chars)-1)]; $r = rand(0, 192); $g = rand(0, 192); $b = rand(0, 192); $color = imagecolorallocate($img, $r, $g, $b); $rotation = rand(-35, 35); $x = 5+$i*(4/3*$font_size+2); $y = rand(4/3*$font_size, $height-(4/3*$font_size)/2); imagettftext($img, $font_size, $rotation, $x, $y, $color, $font, $chr); } $_SESSION['random_txt'] = md5($code); header("Content-type: image/png"); header("Expires: Mon, 01 Jul 1998 05:00:00 GMT"); header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); header("Cache-Control: no-store, no-cache, must-revalidate"); header("Cache-Control: post-check=0, pre-check=0", false); header("Pragma: no-cache"); imagepng($img); imagedestroy($img); </code></pre>
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    1. COWhy not just use a great captcha script already made and free to use? It is called `recpatcha` and is available from http://www.recaptcha.org
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    2. COThat would be: http://www.recaptcha.org/
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    3. COHi i always did use recaptcha but i dislike it now, i don't like the fact that if javascript is disabled by user it displays awful on the webpage plus it's to clunky hence why i ditched recaptcha after using it for about 2 years, i redesigned my website and it just does not suit my site, plus i got 2 other methods that i have implemented with the captcha to help prevent spambots. I am just looking for someone to alter the code to add random lines for me if they don't mind, i don't want to use any other scripts i want to keep to this one as it's simple and not bogged down. Thanks
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