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<?php################################################################ Anti-spam Image Generator (CAPTCHA) 1.0################################################################ For updates visit http://www.zubrag.com/scripts/############################################################### // Font name to use. Make sure it is available on the server.// You could upload it to the same folder with script if it cannot find font.// By default it uses arial.ttf font.$font = 'arial'; // list possible characters to include on the CAPTCHA$charset = '0123456789'; // how many characters include in the CAPTCHA$code_length = 6; // antispam image height$height = 20; // antispam image width$width = 80; ############################################################# END OF SETTINGS############################################################ // this will start session if not started yet@session_start(); $code = '';for($i=0; $i < $code_length; $i++) { $code = $code . substr($charset, mt_rand(0, strlen($charset) - 1), 1);} $font_size = $height * 0.7;$image = @imagecreate($width, $height);$background_color = @imagecolorallocate($image, 255, 255, 255);$noise_color = @imagecolorallocate($image, 20, 40, 100); /* add image noise */for($i=0; $i < ($width * $height) / 4; $i++) { @imageellipse($image, mt_rand(0,$width), mt_rand(0,$height), 1, 1, $noise_color);}/* render text */$text_color = @imagecolorallocate($image, 20, 40, 100);@imagettftext($image, $font_size, 0, 7,17, $text_color, $font , $code) or die('Cannot render TTF text.'); /* output image to the browser */header('Content-Type: image/png');@imagepng($image) or die('imagepng error!');@imagedestroy($image);$_SESSION['AntiSpamImage'] = $code;exit();?>
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