- <?php
- /**
- * vCode(m,n,x,y) m个数字 显示大小为n 边宽x 边高y
- * http://blog.qita.in
- * 自己改写记录session $code
- */
- session_start();
- vCode(4, 15); //4个数字,显示大小为15
- function vCode($num = 4, $size = 20, $width = 0, $height = 0) {
- !$width && $width = $num * $size * 4 / 5 + 5;
- !$height && $height = $size + 10;
- // 去掉了 0 1 O l 等
- $str = "23456789abcdefghijkmnpqrstuvwxyzABCDEFGHIJKLMNPQRSTUVW";
- $code = '';
- for ($i = 0; $i < $num; $i++) {
- $code .= $str[mt_rand(0, strlen($str)-1)];
- }
- // 画图像
- $im = imagecreatetruecolor($width, $height);
- // 定义要用到的颜色
- $back_color = imagecolorallocate($im, 235, 236, 237);
- $boer_color = imagecolorallocate($im, 118, 151, 199);
- $text_color = imagecolorallocate($im, mt_rand(0, 200), mt_rand(0, 120), mt_rand(0, 120));
- // 画背景
- imagefilledrectangle($im, 0, 0, $width, $height, $back_color);
- // 画边框
- imagerectangle($im, 0, 0, $width-1, $height-1, $boer_color);
- // 画干扰线
- for($i = 0;$i < 5;$i++) {
- $font_color = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
- imagearc($im, mt_rand(- $width, $width), mt_rand(- $height, $height), mt_rand(30, $width * 2), mt_rand(20, $height * 2), mt_rand(0, 360), mt_rand(0, 360), $font_color);
- }
- // 画干扰点
- for($i = 0;$i < 50;$i++) {
- $font_color = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
- imagesetpixel($im, mt_rand(0, $width), mt_rand(0, $height), $font_color);
- }
- // 画验证码
- @imagefttext($im, $size , 0, 5, $size + 3, $text_color, 'c:\\\\WINDOWS\\\\Fonts\\\\simsun.ttc', $code);
- $_SESSION["VerifyCode"]=$code;
- header("Cache-Control: max-age=1, s-maxage=1, no-cache, must-revalidate");
- header("Content-type: image/png;charset=gb2312");
- imagepng($im);
- imagedestroy($im);
- }
- ?>
- //该片段来自于http://www.codesnippet.cn/detail/170620134086.html
来源: http://www.codesnippet.cn/detail/170620134086.html