[原]RobotFrameWork（三）数据类型 

 1 //验证码
 2 function _code($_width = 75, $_height = 25) {
 3 //随机字符
 4 for ($i = 0; $i < 4; $i++) {
 5 $_num .= dechex(mt_rand(0, 15));
 6 }
 7 
 8 $_SESSION['code'] = $_num;
 9 //创建图像
10 $im = imagecreatetruecolor($_width, $_height);
11 
12 //填充背景色
13 $bg_color = imagecolorallocate($im, 250, 250, 250);
14 imagefill($im, 0, 0, $bg_color);
15 //四条随机线条
16 for ($i = 0; $i < 6; $i++) {
17 $linecolor = imagecolorallocate($im, mt_rand(150, 255), mt_rand(150, 200),
18 mt_rand(150, 200)); //线条颜色
19 imageline($im, mt_rand(1, $_width), mt_rand(1, $_height), mt_rand(1, $_width),
20 mt_rand(1, $_height), $linecolor);
21 }
22 
23 //随机噪点
24 for ($i = 0; $i < 1000; $i++) {
25 $dotcolor = imagecolorallocate($im, mt_rand(200, 255), mt_rand(200, 255),
26 mt_rand(200, 255)); //噪点颜色
27 imagesetpixel($im, mt_rand(0, $_width), mt_rand(0, $_height), $dotcolor);
28 }
29 
30 //写入字符
31 for ($i = 0; $i < strlen($_SESSION['code']); $i++) {
32 $txtcolor = imagecolorallocate($im, mt_rand(0, 100), mt_rand(0, 100), mt_rand(0,
33 100)); //字符颜色
34 imagestring($im, mt_rand(3, 5), $i * $_width / 4 + mt_rand(1, 10), mt_rand(1, $_height /
35 2), $_SESSION['code'][$i], $txtcolor);
36 }
37 //输出图像
38 header('Content-Type: image/png');
39 imagepng($im);
40 
41 //销毁
42 imagedestroy($im);
43 }

 

posted @ 2013-06-05 19:56  狼秦  阅读(1421)  评论(0)  编辑  收藏  举报