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验证码文件类

时间：2021-07-01 10:21:17 帮助过：2人阅读

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]sxf02615@163.com[/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;$i<=128;$i++)
  72. {
  73. $this->mDisturbColor = imagecolorallocate ($this->mCheckImage, rand(0,255), rand(0,255), rand(0,255));
  74. imagesetpixel($this->mCheckImage,rand(2,128),rand(2,38),$this->mDisturbColor);
  75. }
  76. }
  78. /**
  79. *
  80. * @brief 设置验证码图片的大小
  81. *
  82. * @param $width 宽
  83. *
  84. * @param $height 高
  85. *
  86. */
  87. public function SetCheckImageWH($width,$height)
  88. {
  89. if($width==''||$height=='')return false;
  90. $this->mCheckImageWidth = $width;
  91. $this->mCheckImageHeight = $height;
  92. return true;
  93. }
  95. /**
  96. *
  97. * @brief 在验证码图片上逐个画上验证码
  98. *
  99. */
  100. private function WriteCheckCodeToImage()
  101. {
  102. for ($i=0;$i<=$this->mCheckCodeNum;$i++)
  103. {
  104. $bg_color = imagecolorallocate ($this->mCheckImage, rand(0,255), rand(0,128), rand(0,255));
  105. $x = floor($this->mCheckImageWidth/$this->mCheckCodeNum)*$i;
  106. $y = rand(0,$this->mCheckImageHeight-15);
  107. imagechar ($this->mCheckImage, 5, $x, $y, $this->mCheckCode[$i], $bg_color);
  108. }
  109. }
  111. /**
  112. *
  113. * @brief 输出验证码图片
  114. *
  115. */
  116. public function OutCheckImage()
  117. {
  118. $this ->OutFileHeader();
  119. $this ->CreateCheckCode();
  120. $this ->CreateImage();
  121. $this ->SetDisturbColor();
  122. $this ->WriteCheckCodeToImage();
  123. imagepng($this->mCheckImage);
  124. imagedestroy($this->mCheckImage);
  125. }
  126. }
  127. $c_check_code_image = new CCheckCodeFile();
  128. //$c_check_code_image ->SetCheckImageWH(100,50);//设置显示验证码图片的尺寸
  129. $c_check_code_image ->OutCheckImage();
  130. ?>

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