大气漂亮的验证码

自己导入字体，可以按照自己的额需要随便修改。
字体建议是用粗的

1. class Imagecode{
2. private $width ;
3. private $height;
4. private $counts;
5. private $distrubcode;
6. private $fonturl;
7. private $fonturlbg;
8. private $session;
9. /**
10. * Enter description here...
11. *
12. * @param unknown_type $width 宽度
13. * @param unknown_type $height 高度
14. * @param unknown_type $counts 字符个数
15. * @param unknown_type $distrubcode 随机字符范围
16. * @param unknown_type $fonturl 严重码字体
17. * @param unknown_type $fonturlbg 干扰字符字体
18. */
19. function __construct($width = 120,$height = 30,$counts = 5,$distrubcode="1235467890qwertyuipkjhgfdaszxcvbnm",$fonturl="msyhbd.ttf",$fonturlbg='f.ttf'){
20. $this->width=$width;
21. $this->height=$height;
22. $this->counts=$counts;
23. $this->distrubcode=$distrubcode;
24. $this->fonturl=$fonturl;
25. $this->fonturlbg=$fonturlbg ? $fonturlbg :$fonturl;//未设置干扰字体时使用
26. $this->session=$this->sessioncode();
27. session_start();
28. $_SESSION['code']=$this->session;
29. }
31. function imageout(){
32. $im=$this->createimagesource();
33. $this->setbackgroundcolor($im);
34. $this->set_code($im);
35. $this->setdistrubecode($im);
36. ImageGIF($im);
37. ImageDestroy($im);
38. }
40. private function createimagesource(){
41. return imagecreate($this->width,$this->height);
42. }
43. private function setbackgroundcolor($im){
44. $bgcolor = ImageColorAllocate($im, rand(200,255),rand(200,255),rand(200,255));//±3?°??é?
45. imagefill($im,0,0,$bgcolor);
46. }
47. private function setdistrubecode($im){
48. $count_h=$this->height;
49. $cou=floor($count_h*2);
50. for($i=0;$i $x=rand(0,$this->width);
51. $y=rand(0,$this->height);
52. $jiaodu=rand(0,360);
53. $fontsize=rand(8,15);
54. $fonturl=$this->fonturlbg;
55. $originalcode = $this->distrubcode;
56. $countdistrub = strlen($originalcode);
57. $dscode = $originalcode[rand(0,$countdistrub-1)];
58. $color = ImageColorAllocate($im, rand(40,140),rand(40,140),rand(40,140));//干扰文字颜色
59. imagettftext($im,$fontsize,$jiaodu,$x,$y,$color,$fonturl,$dscode);
61. }
62. }
63. private function set_code($im){
64. $width=$this->width;
65. $counts=$this->counts;
66. $height=$this->height;
67. $scode=$this->session;
68. $y=floor($height/2)+floor($height/4);
69. $fontsize=rand(30,35);
70. $fonturl=$this->fonturl;
72. $counts=$this->counts;
73. for($i=0;$i $char=$scode[$i];
74. $x=floor($width/$counts)*$i+8;
75. $jiaodu=rand(-20,30);
76. $color = ImageColorAllocate($im,rand(0,200),rand(50,200),rand(100,240));//文字颜色
77. imagettftext($im,$fontsize,$jiaodu,$x,$y,$color,$fonturl,$char);
78. }
82. }
83. private function sessioncode(){
84. $originalcode = $this->distrubcode;
85. $countdistrub = strlen($originalcode);
86. $_dscode = "";
87. $counts=$this->counts;
88. for($j=0;$j $dscode = $originalcode[rand(0,$countdistrub-1)];
89. $_dscode.=$dscode;
90. }
91. return $_dscode;
93. }
94. }
95. Header("Content-type: image/GIF");
96. $imagecode=new Imagecode(160,50);
97. $imagecode->imageout();

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