验证码文件类

验证码文件类

1. /**
2. * @file
3. * @version 1.0
4. * @author 网海浪子
5. * @date 2006-3-30
6. * @email [email][e-mail][/email]
7. * @brief 验证码文件类
8. *
9. */
10. ?>
11. class CCheckCodeFile
12. {
13. //验证码位数
14. private $mCheckCodeNum = 4;
16. //产生的验证码
17. private $mCheckCode = '';
19. //验证码的图片
20. private $mCheckImage = '';
22. //干扰像素
23. private $mDisturbColor = '';
25. //验证码的图片宽度
26. private $mCheckImageWidth = '80';
28. //验证码的图片宽度
29. private $mCheckImageHeight = '20';
31. /**
32. *
33. * @brief 输出头
34. *
35. */
36. private function OutFileHeader()
37. {
38. header ("Content-type: image/png");
39. }
41. /**
42. *
43. * @brief 产生验证码
44. *
45. */
46. private function CreateCheckCode()
47. {
48. $this->mCheckCode = strtoupper(substr(md5(rand()),0,$this->mCheckCodeNum));
49. return $this->mCheckCode;
50. }
52. /**
53. *
54. * @brief 产生验证码图片
55. *
56. */
57. private function CreateImage()
58. {
59. $this->mCheckImage = @imagecreate ($this->mCheckImageWidth,$this->mCheckImageHeight);
60. imagecolorallocate ($this->mCheckImage, 200, 200, 200);
61. return $this->mCheckImage;
62. }
64. /**
65. *
66. * @brief 设置图片的干扰像素
67. *
68. */
69. private function SetDisturbColor()
70. {
71. for ($i=0;$i {
72. $this->mDisturbColor = imagecolorallocate ($this->mCheckImage, rand(0,255), rand(0,255), rand(0,255));
73. imagesetpixel($this->mCheckImage,rand(2,128),rand(2,38),$this->mDisturbColor);
74. }
75. }
77. /**
78. *
79. * @brief 设置验证码图片的大小
80. *
81. * @param $width 宽
82. *
83. * @param $height 高
84. *
85. */
86. public function SetCheckImageWH($width,$height)
87. {
88. if($width==''||$height=='')return false;
89. $this->mCheckImageWidth = $width;
90. $this->mCheckImageHeight = $height;
91. return true;
92. }
94. /**
95. *
96. * @brief 在验证码图片上逐个画上验证码
97. *
98. */
99. private function WriteCheckCodeToImage()
100. {
101. for ($i=0;$imCheckCodeNum;$i++)
102. {
103. $bg_color = imagecolorallocate ($this->mCheckImage, rand(0,255), rand(0,128), rand(0,255));
104. $x = floor($this->mCheckImageWidth/$this->mCheckCodeNum)*$i;
105. $y = rand(0,$this->mCheckImageHeight-15);
106. imagechar ($this->mCheckImage, 5, $x, $y, $this->mCheckCode[$i], $bg_color);
107. }
108. }
110. /**
111. *
112. * @brief 输出验证码图片
113. *
114. */
115. public function OutCheckImage()
116. {
117. $this ->OutFileHeader();
118. $this ->CreateCheckCode();
119. $this ->CreateImage();
120. $this ->SetDisturbColor();
121. $this ->WriteCheckCodeToImage();
122. imagepng($this->mCheckImage);
123. imagedestroy($this->mCheckImage);
124. }
125. }
126. $c_check_code_image = new CCheckCodeFile();
127. //$c_check_code_image ->SetCheckImageWH(100,50);//设置显示验证码图片的尺寸
128. $c_check_code_image ->OutCheckImage();
129. ?>

复制代码