cool php captcha

cool-php-captcha 是一个很酷的 PHP 用来生成验证码的库。示例代码：session_start();$captcha = new SimpleCaptcha();// Change configuration...//$captcha->wordsFile = null;           // Disable dictionary words//$captcha->wordsFile = 'words/es.txt'; // Enable spanish words//$captcha->session_var = 'secretword'; // Change sess