Файл: include/captcha.php
Строк: 46
<?php
include("config.php");
class CaptchaSecurityImages {
var $font = 'fonts/monofont.ttf';
function generateCode($characters) {
$possible = '23456789bcdfghjkmnpqrstvwxyz';
$code = '';
$i = 0;
while ($i < $characters) {
$code .= substr($possible, mt_rand(0, strlen($possible)-1), 1);
$i++;
}
return $code;
}
function CaptchaSecurityImages($width='200',$height='40',$characters='6') {
$code = $this->generateCode($characters);
$font_size = $height * 0.75;
$image = @imagecreate($width, $height) or die('Cannot initialize new GD image stream');
$background_color = imagecolorallocate($image, 255, 255, 255);
$text_color = imagecolorallocate($image, 137, 136, 136);
$noise_color = imagecolorallocate($image, 166, 165, 165);
for( $i=0; $i<3; $i++ ) {
imagefilledellipse($image, mt_rand(0,$width), mt_rand(0,$height), 1, 1, $noise_color);
}
for( $i=0; $i<5; $i++ ) {
imageline($image, mt_rand(0,$width), mt_rand(0,$height), mt_rand(0,$width), mt_rand(0,$height), $noise_color);
}
$textbox = imagettfbbox($font_size, 0, $this->font, $code) or die('Error in imagettfbbox function');
$x = ($width - $textbox[4])/2;
$y = ($height - $textbox[5])/2;
imagettftext($image, $font_size, 0, $x, $y, $text_color, $this->font , $code) or die('Error in imagettftext function');
header('Content-Type: image/jpeg');
imagejpeg($image);
imagedestroy($image);
$_SESSION['imagecode'] = $code;
}
}
$width = isset($_GET['width']) ? $_GET['width'] : '200';
$height = isset($_GET['height']) ? $_GET['height'] : '40';
$characters = isset($_GET['characters']) && $_GET['characters'] > 1 ? $_GET['characters'] : '6';
$captcha = new CaptchaSecurityImages($width,$height,$characters);
?>