Closes #1011: Added basic captcha support.

git-svn-id: https://code.elgg.org/elgg/trunk@3270 36083f99-b078-4883-b0ff-0f9b5a30f544

1 files changed, 41 insertions, 0 deletions

diff --git a/mod/captcha/captcha.php b/mod/captcha/captcha.php
new file mode 100644
index 000000000..5693b89ac
--- /dev/null
+++ b/mod/captcha/captcha.php
@@ -0,0 +1,41 @@
+<?php
+	/**
+	 * Elgg captcha plugin graphics file generator
+	 * 
+	 * @package ElggCaptcha
+	 * @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2
+	 * @author Curverider Ltd
+	 * @copyright Curverider Ltd 2008-2009
+	 * @link http://elgg.com/
+	 */
+
+	global $CONFIG;
+	$token = get_input('captcha_token');
+
+	// 	Output captcha
+	if ($token)
+	{ 
+		// Set correct header
+		header("Content-type: image/jpeg");
+	
+		// Generate captcha
+		$captcha = captcha_generate_captcha($token);
+		
+		// Pick a random background image
+		$n = rand(1, $CONFIG->captcha_num_bg);
+		$image = imagecreatefromjpeg($CONFIG->pluginspath . "captcha/backgrounds/bg$n.jpg");	
+		
+		// Create a colour (black so its not a simple matter of masking out one colour and ocring the rest)
+		$colour = imagecolorallocate($image, 0,0,0);
+		
+		// Write captcha to image
+		//imagestring($image, 5, 30, 4, $captcha, $black);
+		imagettftext($image, 30, 0, 10, 30, $colour, $CONFIG->pluginspath . "captcha/fonts/1.ttf", $captcha);
+		
+		// Output image
+		imagejpeg($image);
+		
+		// Free memory
+		imagedestroy($image);
+	}
+?>
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