支持中文字母数字、自定义字体php验证码程序

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支持中文字母数字、自定义字体php验证码程序

1. <?php
   
2. /*
   
3. * Captcha Class base on PHP GD Lib
   
4. * @author Design
   
5. * @version 1.0
   
6. * @copyright http://www.hzhuti.com/nokia/n97/ 2010
   
7. * @demo
   
8. * include('captchaClass.php');
   
9. * $captchaDemo=new Captcha();
   
10. * $captchaDemo->createImage();
    
11. */
    
12. class Captcha{
    
13. //@定义验证码图片高度
    
14. private $height;
    
15. //@定义验证码图片宽度
    
16. private $width;
    
17. //@定义验证码字符个数
    
18. private $textNum;
    
19. //@定义验证码字符内容
    
20. private $textContent;
    
21. //@定义字符颜色
    
22. private $fontColor;
    
23. //@定义随机出的文字颜色
    
24. private $randFontColor;
    
25. //@定义字体大小
    
26. private $fontSize;
    
27. //@定义字体
    
28. private $fontFamily;
    
29. //@定义背景颜色
    
30. private $bgColor;
    
31. //@定义随机出的背景颜色
    
32. private $randBgColor;
    
33. //@定义字符语言
    
34. private $textLang;
    
35. //@定义干扰点数量
    
36. private $noisePoint;
    
37. //@定义干扰线数量
    
38. private $noiseLine;
    
39. //@定义是否扭曲
    
40. private $distortion;
    
41. //@定义扭曲图片源
    
42. private $distortionImage;
    
43. //@定义是否有边框
    
44. private $showBorder;
    
45. //@定义验证码图片源
    
46. private $image;
    
47. 
    
48. //@Constructor 构造函数
    
49. public function Captcha(){
    
50. $this->textNum=4;
    
51. $this->fontSize=16;
    
52. $this->fontFamily='c:\windows\fontsSIMYOU.ttf';//设置中文字体，可以改成linux的目录
    
53. $this->textLang='en';
    
54. $this->noisePoint=30;
    
55. $this->noiseLine=3;
    
56. $this->distortion=false;
    
57. $this->showBorder=false;
    
58. }
    
59. 
    
60. 
    
61. 
    
62. //@设置图片宽度
    
63. public function setWidth($w){
    
64. $this->width=$w;
    
65. }
    
66. 
    
67. //@设置图片高度
    
68. public function setHeight($h){
    
69. $this->height=$h;
    
70. }
    
71. 
    
72. //@设置字符个数
    
73. public function setTextNumber($textN){
    
74. $this->textNum=$textN;
    
75. }
    
76. 
    
77. //@设置字符颜色
    
78. public function setFontColor($fc){
    
79. $this->fontColor=sscanf($fc,'#%2x%2x%2x');
    
80. }
    
81. 
    
82. //@设置字号
    
83. public function setFontSize($n){
    
84. $this->fontSize=$n;
    
85. }
    
86. 
    
87. //@设置字体
    
88. public function setFontFamily($ffUrl){
    
89. $this->fontFamily=$ffUrl;
    
90. }
    
91. 
    
92. //@设置字符语言
    
93. public function setTextLang($lang){
    
94. $this->textLang=$lang;
    
95. }
    
96. 
    
97. //@设置图片背景
    
98. public function setBgColor($bc){
    
99. $this->bgColor=sscanf($bc,'#%2x%2x%2x');
    
100. }
     
101. 
     
102. //@设置干扰点数量
     
103. public function setNoisePoint($n){
     
104. $this->noisePoint=$n;
     
105. }
     
106. 
     
107. //@设置干扰线数量
     
108. public function setNoiseLine($n){
     
109. $this->noiseLine=$n;
     
110. }
     
111. 
     
112. //@设置是否扭曲
     
113. public function setDistortion($b){
     
114. $this->distortion=$b;
     
115. }
     
116. 
     
117. //@设置是否显示边框
     
118. public function setShowBorder($border){
     
119. $this->showBorder=$border;
     
120. }
     
121. 
     
122. //@初始化验证码图片
     
123. public function initImage(){
     
124. if(empty($this->width)){$this->width=floor($this->fontSize*1.3)*$this->textNum+10;}
     
125. if(empty($this->height)){$this->height=$this->fontSize*2;}
     
126. $this->image=imagecreatetruecolor($this->width,$this->height);
     
127. if(empty($this->bgColor)){
     
128. $this->randBgColor=imagecolorallocate($this->image,mt_rand(100,255),mt_rand(100,255),mt_rand(100,255));
     
129. }else{
     
130. $this->randBgColor=imagecolorallocate($this->image,$this->bgColor[0],$this->bgColor[1],$this->bgColor[2]);
     
131. }
     
132. imagefill($this->image,0,0,$this->randBgColor);
     
133. }
     
134. 
     
135. //@产生随机字符
     
136. public function randText($type){
     
137. $string='';
     
138. switch($type){
     
139. case 'en':
     
140. $str='ABCDEFGHJKLMNPQRSTUVWXY3456789';
     
141. for($i=0;$i<$this->textNum;$i++){
     
142. $string=$string.','.$str[mt_rand(0,29)];
     
143. }
     
144. break;
     
145. case 'cn':
     
146. for($i=0;$i<$this->textNum;$i++) {
     
147. $string=$string.','.chr(rand(0xB0,0xCC)).chr(rand(0xA1,0xBB));
     
148. }
     
149. $string=iconv('GB2312','UTF-8',$string); //转换编码到utf8
     
150. break;
     
151. }
     
152. return substr($string,1);
     
153. }
     
154. 
     
155. //@输出文字到验证码
     
156. public function createText(){
     
157. $textArray=explode(',',$this->randText($this->textLang));
     
158. $this->textContent=join('',$textArray);
     
159. if(empty($this->fontColor)){
     
160. $this->randFontColor=imagecolorallocate($this->image,mt_rand(0,100),mt_rand(0,100),mt_rand(0,100));
     
161. }else{
     
162. $this->randFontColor=imagecolorallocate($this->image,$this->fontColor[0],$this->fontColor[1],$this->fontColor[2]);
     
163. }
     
164. for($i=0;$i<$this->textNum;$i++){
     
165. $angle=mt_rand(-1,1)*mt_rand(1,20);
     
166. imagettftext($this->image,$this->fontSize,$angle,5+$i*floor($this->fontSize*1.3),floor($this->height*0.75),$this->randFontColor,$this->fontFamily,$textArray[$i]);
     
167. }
     
168. }
     
169. 
     
170. //@生成干扰点
     
171. public function createNoisePoint(){
     
172. for($i=0;$i<$this->noisePoint;$i++){
     
173. $pointColor=imagecolorallocate($this->image,mt_rand(0,255),mt_rand(0,255),mt_rand(0,255));
     
174. imagesetpixel($this->image,mt_rand(0,$this->width),mt_rand(0,$this->height),$pointColor);
     
175. }
     
176. 
     
177. }
     
178. 
     
179. //@产生干扰线
     
180. public function createNoiseLine(){
     
181. for($i=0;$i<$this->noiseLine;$i++) {
     
182. $lineColor=imagecolorallocate($this->image,mt_rand(0,255),mt_rand(0,255),20);
     
183. imageline($this->image,0,mt_rand(0,$this->width),$this->width,mt_rand(0,$this->height),$lineColor);
     
184. }
     
185. }
     
186. 
     
187. //@扭曲文字
     
188. public function distortionText(){
     
189. $this->distortionImage=imagecreatetruecolor($this->width,$this->height);
     
190. imagefill($this->distortionImage,0,0,$this->randBgColor);
     
191. for($x=0;$x<$this->width;$x++){
     
192. for($y=0;$y<$this->height;$y++){
     
193. $rgbColor=imagecolorat($this->image,$x,$y);
     
194. imagesetpixel($this->distortionImage,(int)($x+sin($y/$this->height*2*M_PI-M_PI*0.5)*3),$y,$rgbColor);
     
195. }
     
196. }
     
197. $this->image=$this->distortionImage;
     
198. }
     
199. 
     
200. //@生成验证码图片
     
201. public function createImage(){
     
202. $this->initImage(); //创建基本图片
     
203. $this->createText(); //输出验证码字符
     
204. if($this->distortion){$this->distortionText();} //扭曲文字
     
205. $this->createNoisePoint(); //产生干扰点
     
206. $this->createNoiseLine(); //产生干扰线
     
207. if($this->showBorder){imagerectangle($this->image,0,0,$this->width-1,$this->height-1,$this->randFontColor);} //添加边框
     
208. imagepng($this->image);
     
209. imagedestroy($this->image);
     
210. if($this->distortion){imagedestroy($this->$distortionImage);}
     
211. return $this->textContent;
     
212. }
     
213. 
     
214. }
     
215. ?>使用方法：
     
216. 
     
217. <?php
     
218. //session_start();
     
219. header("Content-type:image/png");
     
220. include('captcha5_class.php');
     
221. $captcha5=new Captcha();
     
222. 
     
223. //@设置验证码宽度
     
224. //$captcha5->setWidth(200);
     
225. 
     
226. //@设置验证码高度
     
227. //$captcha5->setHeight(50);
     
228. 
     
229. //@设置字符个数
     
230. $captcha5->setTextNumber(5);
     
231. 
     
232. //@设置字符颜色
     
233. //$captcha5->setFontColor('#ff9900');
     
234. 
     
235. //@设置字号大小
     
236. //$captcha5->setFontSize(25);
     
237. 
     
238. //@设置字体
     
239. $captcha5->setFontFamily('c:\windows\fonts\STXINGKA.TTF');
     
240. 
     
241. //@设置语言
     
242. $captcha5->setTextLang('cn');
     
243. 
     
244. //@设置背景颜色
     
245. //$captcha5->setBgColor('#000000');
     
246. 
     
247. //@设置干扰点数量
     
248. //$captcha5->setNoisePoint(600);
     
249. 
     
250. //@设置干扰线数量
     
251. //$captcha5->setNoiseLine(10);
     
252. 
     
253. //@设置是否扭曲
     
254. //$captcha5->setDistortion(true);
     
255. 
     
256. //@设置是否显示边框
     
257. $captcha5->setShowBorder(true);
     
258. 
     
259. //输出验证码
     
260. $code=$captcha5->createImage();
     
261. //$_SESSION['captchaCode']['content']=$code;
     
262. //$_SESSION['captchaCode']['time']=microtime();
     
263. ?>

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