Пример #1
0
            $value = $_SESSION[$key] = str_pad(mt_rand(0, 9999), 4, '0', STR_PAD_LEFT);
            session_write_close();
            // 生成验证码图
            header('Content-type: image/png');
            header("Expires: Mon, 26 Jul 1997 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 ");
            $im = imagecreate(47, 17);
            $color = imagecolorallocate($im, 255, 255, 255);
            imagefill($im, 0, 0, $color);
            $color = imagecolorallocate($im, 255, 0, 0);
            imagestring($im, 5, 5, 1, $value, $color);
            imagepng($im);
            imagedestroy($im);
        } else {
            // 返回验证码号
            session_start();
            $value = isset($_SESSION[$key]) ? $_SESSION[$key] : null;
            unset($_SESSION[$key]);
            session_write_close();
            return $authcode === $value;
        }
    }
}
/**
 * 执行(execute)
 */
front::stub() and front::main();