这款关于php 中文汉字验证码生成程序其实很简单的,生成中文汉字验证码需要字体来支持了,下面我们用的arial.ttf来支持生成,否则生成中文图片验证码会出乱码的.

php 中文汉字验证码生成程序代码如下:

1. class securecode
2. {
3. private static $instance=null;
4. private $code = '';
5. private $fontfile;
6. private $validate;
7. private $image;
8. private $specialadd = 'special string for securecode';
9. private $codeexpire=86400;
10. private $codecookiename='secure_code';
11. /**
12. * 构造方法
13. */
14. private function securecode()
15. {
16. $this->fontfile = dirname( __file__ ) . '/arial.ttf';
17. }
18. private function __construct()
19. {
20. $this->securecode();
21. }
22. public static function getinstance()
23. {
24. if (self::$instance==null)
25. self::$instance=new self();
26. return self::$instance;
27. }
28. /**
29. * 指定字体文件所在路径，默认为当前文件夹下arial.ttf文件
30. * @param $fontfile 文件路径
31. * @return void
32. */
33. function loadfont($fontfile)
34. {
35. $this->fontfile = $fontfile;
36. }
37. /**
38. * 图片输出方法，在执行本方法前程序不应该有任何形式的输出
39. * @return void;
40. */
41. function stroke()
42. {
43. $this->savecode();
44. self::sendheader();
45. imagegif( $this->validate );
46. imagedestroy( $this->validate );
47. imagedestroy( $this->image );
48. }
49. /**
50. * 图片保存方法
51. * @param $filename 保存路径
52. * @return void
53. */
54. function save($filename)
55. {
56. $this->savecode();
57. imagegif( $this->validate , $filename );
58. imagedestroy( $this->validate );
59. imagedestroy( $this->image );
60. }
61. /**
62. * 验证码验证方法
63. * @param $input 要验证的字符串，即用户的输入内容
64. * @return boolean 验证结果
65. */
66. function verify($input)
67. {
68. $input=strtolower($input);
69. $targetcode=$this->authcode($input);
70. $code=$this->getcookie();
71. if (emptyempty($code)||$code!=$targetcode)
72. $result= false;
73. else
74. $result=true;
75. $_cookie[$this->codecookiename]='';
76. setcookie ( $this->codecookiename, '', - 1 );
77. return $result;
78. }
79. /**
80. * 图片创建方法
81. * @return void;
82. */
83. function createimage()
84. {
85. $this->randcode();
86. $size = 30;
87. $width = 90;
88. $height = 35;
89. $degrees = array (
90. rand( 0 , 30 ), rand( 0 , 30 ), rand( 0 , 30 ), rand( 0 , 30 )
91. );
92. for ($i = 0; $i < 4; ++$i)
93. {
94. if (rand() % 2);
95. else $degrees[$i] = -$degrees[$i];
96. }
97. $this->image = imagecreatetruecolor( $size , $size );
98. $this->validate = imagecreatetruecolor( $width , $height );
99. $back = imagecolorallocate( $this->image , 255 , 255 , 255 );
100. $border = imagecolorallocate( $this->image , 0 , 0 , 0 );
101. imagefilledrectangle( $this->validate , 0 , 0 , $width , $height , $back );
102. for ($i = 0; $i < 4; ++$i)
103. {
104. $temp = self::rgbtohsv( rand( 0 , 250 ) , rand( 0 , 150 ) , rand( 0 , 250 ) );
105. if ($temp[2] > 60) $temp[2] = 60;
106. $temp = self::hsvtorgb( $temp[0] , $temp[1] , $temp[2] );
107. $textcolor[$i] = imagecolorallocate( $this->image , $temp[0] , $temp[1] , $temp[2] );
108. }
109. for ($i = 0; $i < 200; ++$i)
110. {
111. $randpixelcolor = imagecolorallocate( $this->validate , rand( 0 , 255 ) , rand( 0 , 255 ) , rand( 0 , 255 ) );
112. imagesetpixel( $this->validate , rand( 1 , 87 ) , rand( 1 , 35 ) , $randpixelcolor );
113. }
114. $temp = self::rgbtohsv( rand( 220 , 255 ) , rand( 220 , 255 ) , rand( 220 , 255 ) );
115. if ($temp[2] < 200) $temp[2] = 255;
116. $temp = self::hsvtorgb( $temp[0] , $temp[1] , $temp[2] );
117. $randlinecolor = imagecolorallocate( $this->image , $temp[0] , $temp[1] , $temp[2] );
118. self::imagelinethick( $this->validate , $textcolor[rand( 0 , 3 )] );
119. imagefilledrectangle( $this->image , 0 , 0 , $size , $size , $back );
120. putenv( 'gdfontpath=' . realpath( '.' ) );
121. // name the font to be used (note the lack of the .ttf extension
122. imagettftext( $this->image , 15 , 0 , 8 , 20 , $textcolor[0] , $this->fontfile , $this->code[0] );
123. $this->image = imagerotate( $this->image , $degrees[0] , $back );
124. imagecolortransparent( $this->image , $back );
125. imagecopymerge( $this->validate , $this->image , 1 , 4 , 4 , 5 , imagesx( $this->image ) - 10 , imagesy( $this->image ) - 10 , 100 );
126. $this->image = imagecreatetruecolor( $size , $size );
127. imagefilledrectangle( $this->image , 0 , 0 , $size , $size , $back );
128. imagettftext( $this->image , 15 , 0 , 8 , 20 , $textcolor[1] , $this->fontfile , $this->code[1] );
129. $this->image = imagerotate( $this->image , $degrees[1] , $back );
130. imagecolortransparent( $this->image , $back );
131. imagecopymerge( $this->validate , $this->image , 21 , 4 , 4 , 5 , imagesx( $this->image ) - 10 , imagesy( $this->image ) - 10 , 100 );
132. $this->image = imagecreatetruecolor( $size , $size );
133. imagefilledrectangle( $this->image , 0 , 0 , $size - 1 , $size - 1 , $back );
134. imagettftext( $this->image , 15 , 0 , 8 , 20 , $textcolor[2] , $this->fontfile , $this->code[2] );
135. $this->image = imagerotate( $this->image , $degrees[2] , $back );
136. imagecolortransparent( $this->image , $back );
137. imagecopymerge( $this->validate , $this->image , 41 , 4 , 4 , 5 , imagesx( $this->image ) - 10 , imagesy( $this->image ) - 10 , 100 );
138. $this->image = imagecreatetruecolor( $size , $size );
139. imagefilledrectangle( $this->image , 0 , 0 , $size - 1 , $size - 1 , $back );
140. imagettftext( $this->image , 15 , 0 , 8 , 20 , $textcolor[3] , $this->fontfile , $this->code[3] );
141. $this->image = imagerotate( $this->image , $degrees[3] , $back );
142. imagecolortransparent( $this->image , $back );
143. imagecopymerge( $this->validate , $this->image , 61 , 4 , 4 , 5 , imagesx( $this->image ) - 10 , imagesy( $this->image ) - 10 , 100 );
144. imagerectangle( $this->validate , 0 , 0 , $width - 1 , $height - 1 , $border );
145. }
146. //开源代码phpfensi.com
147. /**
148. * 获取随机生成的验证码
149. * @return string 随机验证码，返回的验证码不进行任何处理
150. */
151. function getcode()
152. {
153. return $this->code;
154. }
155. /**
156. * 生成随机码方法
157. * @return void;
158. */
159. protected function randcode()
160. {
161. $alphastr = 'abcdefghijklmnpqrstuvwxyz123456789';
162. $randstr = array (
163. $alphastr{rand( 0 , 33 )}, $alphastr{rand( 0 , 33 )}, $alphastr{rand( 0 , 33 )}, $alphastr{rand( 0 , 33 )}
164. );
165. $this->code = strtolower( $randstr[0] . $randstr[1] . $randstr[2] . $randstr[3] );
166. }
167. /**
168. * rgb色到hsv色转变方法
169. * @param $r
170. * @param $g
171. * @param $b
172. * @return array hsv数组
173. */
174. protected static function rgbtohsv($r, $g, $b)
175. {
176. $tmp = min( $r , $g );
177. $min = min( $tmp , $b );
178. $tmp = max( $r , $g );
179. $max = max( $tmp , $b );
180. $v = $max;
181. $delta = $max - $min;
182. if ($max != 0) $s = $delta / $max; // s
183. else
184. {
185. $s = 0;
186. //$h = undefinedcolor;
187. return;
188. }
189. if ($r == $max) $h = ($g - $b) / $delta; // between yellow & magenta
190. else if ($g == $max) $h = 2 + ($b - $r) / $delta; // between cyan & yellow
191. else $h = 4 + ($r - $g) / $delta; // between magenta & cyan
192. $h *= 60; // degrees
193. if ($h < 0) $h += 360;
194. return array (
195. $h, $s, $v
196. );
197. }
198. /**
199. * 同上一方法功能相反
200. * @param $h
201. * @param $s
202. * @param $v
203. * @return array rgb数组
204. */
205. protected static function hsvtorgb($h, $s, $v)
206. {
207. if ($s == 0)
208. {
209. // achromatic (grey)
210. $r = $g = $b = $v;
211. return;
212. }
213. $h /= 60; // sector 0 to 5
214. $i = floor( $h );
215. $f = $h - $i; // factorial part of h
216. $p = $v * (1 - $s);
217. $q = $v * (1 - $s * $f);
218. $t = $v * (1 - $s * (1 - $f));
219. switch ($i)
220. {
221. case 0 :
222. $r = $v;
223. $g = $t;
224. $b = $p;
225. break;
226. case 1 :
227. $r = $q;
228. $g = $v;
229. $b = $p;
230. break;
231. case 2 :
232. $r = $p;
233. $g = $v;
234. $b = $t;
235. break;
236. case 3 :
237. $r = $p;
238. $g = $q;
239. $b = $v;
240. break;
241. case 4 :
242. $r = $t;
243. $g = $p;
244. $b = $v;
245. break;
246. default : // case 5:
247. $r = $v;
248. $g = $p;
249. $b = $q;
250. break;
251. }
252. return array (
253. $r, $g, $b
254. );
255. }
256. /**
257. 使用cookie保存验证码的方法
258. * @return void
259. */
260. protected function savecode()
261. {
262. $code = $this->authcode($this->code);
263. $this->setcookie($code);
264. }
265. /**
266. * 验证码cookie值获取方法
267. * @return string cookie值
268. */
269. protected function getcookie()
270. {
271. if (emptyempty( $_cookie[$this->codecookiename] ))
272. {
273. return '';
274. }
275. else
276. {
277. return addslashes($_cookie[$this->codecookiename]);
278. }
279. }
280. /**
281. * 验证码cookie创建方法
282. * @param string $code 要保存的验证码
283. * @return void
284. */
285. protected function setcookie($code)
286. {
287. $expire = $this->codeexpire > 0 ? $this->codeexpire + time() : 0;
288. setcookie( $this->codecookiename , $code, $expire );
289. }
290. /**
291. * 验证码加密方法
292. * @param string $code 要加密的随机码
293. * @return mixed 执行结果
294. */
295. protected function authcode($code)
296. {
297. return md5($code.$this->specialadd);
298. }
299. /**
300. * 干扰线生成方法
301. * @param resource $image 图片资源句柄
302. * @param string $color 干扰线颜色
303. */
304. protected static function imagelinethick($image, $color)
305. {
306. $k = rand( 5 , 20 );
307. for ($px = 0; $px < 400; $px = $px + 1)
308. {
309. $y = $k * sin( 0.1 * ($px) ); //$y=200+10*sin(0.1*($px-200));
310. for ($i = 0; $i < 2; $i++)
311. {
312. imagesetpixel( $image , $px , $y + 10 + $i , $color );
313. }
314. }
315. }
316. /**
317. * http标头设置方法
318. * @return void
319. */
320. protected static function sendheader()
321. {
322. header( "pragma: no-cache" );
323. header( "cache-control: max-age=1, s-maxage=1, no-cache, must-revalidate" );
324. header( 'content-type: image/gif' );
325. }
326. }