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PHP验证码文件类

时间：2021-07-01 10:21:17 帮助过：2人阅读

  2. class CCheckCodeFile
  3. {
  4. //验证码位数
  5. private $mCheckCodeNum = 4;
  7. //产生的验证码
  8. private $mCheckCode = '';
  10. //验证码的图片
  11. private $mCheckImage = '';
  13. //干扰像素
  14. private $mDisturbColor = '';
  16. //验证码的图片宽度
  17. private $mCheckImageWidth = '80';
  19. //验证码的图片宽度
  20. private $mCheckImageHeight = '20';
  22. /**
  23. *
  24. * @brief 输出头
  25. *
  26. */
  27. private function OutFileHeader()
  28. {
  29. header ("Content-type: image/png");
  30. }
  32. /**
  33. *
  34. * @brief 产生验证码
  35. *
  36. */
  37. private function CreateCheckCode()
  38. {
  39. $this->mCheckCode = strtoupper(substr(md5(rand()),0,$this->mCheckCodeNum));
  40. return $this->mCheckCode;
  41. }
  43. /**
  44. *
  45. * @brief 产生验证码图片
  46. *
  47. */
  48. private function CreateImage()
  49. {
  50. $this->mCheckImage = @imagecreate ($this->mCheckImageWidth,$this->mCheckImageHeight);
  51. imagecolorallocate ($this->mCheckImage, 200, 200, 200);
  52. return $this->mCheckImage;
  53. }
  55. /**
  56. *
  57. * @brief 设置图片的干扰像素
  58. *
  59. */
  60. private function SetDisturbColor()
  61. {
  62. for ($i=0;$i<=128;$i++)
  63. {
  64. $this->mDisturbColor = imagecolorallocate ($this->mCheckImage, rand(0,255), rand(0,255), rand(0,255));
  65. imagesetpixel($this->mCheckImage,rand(2,128),rand(2,38),$this->mDisturbColor);
  66. }
  67. }
  69. /**
  70. *
  71. * @brief 设置验证码图片的大小
  72. *
  73. * @param $width 宽
  74. *
  75. * @param $height 高
  76. *
  77. */
  78. public function SetCheckImageWH($width,$height)
  79. {
  80. if($width==''||$height=='')return false;
  81. $this->mCheckImageWidth = $width;
  82. $this->mCheckImageHeight = $height;
  83. return true;
  84. }
  86. /**
  87. *
  88. * @brief 在验证码图片上逐个画上验证码
  89. *
  90. */
  91. private function WriteCheckCodeToImage()
  92. {
  93. for ($i=0;$i<=$this->mCheckCodeNum;$i++)
  94. {
  95. $bg_color = imagecolorallocate ($this->mCheckImage, rand(0,255), rand(0,128), rand(0,255));
  96. $x = floor($this->mCheckImageWidth/$this->mCheckCodeNum)*$i;
  97. $y = rand(0,$this->mCheckImageHeight-15);
  98. imagechar ($this->mCheckImage, 5, $x, $y, $this->mCheckCode[$i], $bg_color);
  99. }
  100. }
  102. /**
  103. *
  104. * @brief 输出验证码图片
  105. *
  106. */
  107. public function OutCheckImage()
  108. {
  109. $this ->OutFileHeader();
  110. $this ->CreateCheckCode();
  111. $this ->CreateImage();
  112. $this ->SetDisturbColor();
  113. $this ->WriteCheckCodeToImage();
  114. imagepng($this->mCheckImage);
  115. imagedestroy($this->mCheckImage);
  116. }
  117. }
  118. $c_check_code_image = new CCheckCodeFile();
  119. //$c_check_code_image ->SetCheckImageWH(100,50);//设置显示验证码图片的尺寸
  120. $c_check_code_image ->OutCheckImage();
  121. ?>

验证码, PHP

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