本文章提供一款php中文汉字验证码生成程序,如果在图片片生成汉字,需要font文件和imagettftext函数,用到的时候大家再网上搜索吧,你要产生随机数,那有mt_rand函数,你还要用到session保存这个随机数,如果需要转成utf-8,需要iconv函数.

php中文汉字验证码生成程序实例代码如下:

1. <?php
2. class simpleimage {
3. var $image;
4. var $image_type;
5. function load($filename) {
6. $image_info = getimagesize($filename);
7. $this->image_type = $image_info[2];
8. if( $this->image_type == imagetype_jpeg ) {
9. $this->image = imagecreatefromjpeg($filename);
10. } elseif( $this->image_type == imagetype_gif ) {
11. $this->image = imagecreatefromgif($filename);
12. } elseif( $this->image_type == imagetype_png ) {
13. $this->image = imagecreatefrompng($filename);
14. }
15. }
16. function save($filename, $image_type=imagetype_jpeg, $compression=75, $permissions=null) {
17. if( $image_type == imagetype_jpeg ) {
18. imagejpeg($this->image,$filename,$compression);
19. } elseif( $image_type == imagetype_gif ) {
20. imagegif($this->image,$filename);
21. } elseif( $image_type == imagetype_png ) {
22. imagepng($this->image,$filename);
23. }
24. if( $permissions != null) {
25. chmod($filename,$permissions);
26. }
27. }
28. function output($image_type=imagetype_jpeg) {
29. if( $image_type == imagetype_jpeg ) {
30. imagejpeg($this->image);
31. } elseif( $image_type == imagetype_gif ) {
32. imagegif($this->image);
33. } elseif( $image_type == imagetype_png ) {
34. imagepng($this->image);
35. }
36. }
37. function getwidth() {
38. return imagesx($this->image);
39. }
40. function getheight() {
41. return imagesy($this->image);
42. }
43. function resizetoheight($height) {
44. $ratio = $height / $this->getheight();
45. $width = $this->getwidth() * $ratio;
46. $this->resize($width,$height);
47. }
48. function resizetowidth($width) {
49. $ratio = $width / $this->getwidth();
50. $height = $this->getheight() * $ratio;
51. $this->resize($width,$height);
52. }
53. function scale($scale) {
54. $width = $this->getwidth() * $scale/100;
55. $height = $this->getheight() * $scale/100;
56. $this->resize($width,$height);
57. }
58. function resize($width,$height) {
59. $new_image = imagecreatetruecolor($width, $height);
60. imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getwidth(), $this->getheight());
61. $this->image = $new_image;
62. }
63. }
64. //开源代码phpfensi.com
65. $newfile = upload_dir."/icons/".md5($_session['user']->email).".jpg";//上传文件保存的目录
66. $image = new simpleimage();
67. $image->load($_files['icons']['tmp_name']);//上传的临时文件名
68. $image->resizetowidth(80);设置宽度
69. $image->save($newfile);
70. ?>