改进的PHP技术下的图片验证码实现方案

Improved PHP technology to achieve the picture captcha

随着"互联网+"概念提出后,理财产品、档案管理等都可以通过Web技术来实现,人们对Web系统安全更加关注。验证码技术能有效防止用户暴力破解方式对注册用户进行不停地登陆尝试、跨站攻击等。PHP是一种脚本编程语言,不仅限于创建HTML输出,也可以创建和处理包括GIF、PNG、JPEG、WBMP以及XPM在内的多种格式的图像。利用PHP程序优势,增强PHP程序可执行性和移植性,对PHP生成图像数据流程序进行类实例化,将验证码输出到浏览器。

With the＂Internet ＋ ＂concept, financial products, such as file management can be realizedthrough the web technology, SO people pay more attention to the safety of Web system. CAPTCHA technologycan effectively prevent users brute force way stop landing attempt, XSS attack on registered users. PHP is ascripting language, not only to create HTML output, but also create and deal with a variety of formats, includingGIF, PNG, JPEG, WBMP, and XPM. Advantage of using PHP program is to enhance the PHP program execut-able and portability, and the PHP image data stream generated procedures for class instantiation, the CAPT-CHA output to the browser.