这篇文章主要汇总介绍了php图片处理类（水印、透明度、缩放、锐化），非常的简单实用，有需要的小伙伴可以参考下。

非常强大的php图片处理类，可以自定义图片水印、透明度、图片缩放、图片锐化、图片旋转、图片翻转、图片剪切、图片反色。

* 图片处理函数功能：缩放、剪切、相框、水印、锐化、旋转、翻转、透明度、反色

* 处理并保存历史记录的思路：当有图片有改动时自动生成一张新图片，命名方式可以考虑在原图片的基础上加上步骤，例如：图片名称+__第几步

具体代码如下：

1. <?php
2. class picture{
3. var $PICTURE_URL; //要处理的图片
4. var $DEST_URL = "temp__01.jpg"; //生成目标图片位置
5. var $PICTURE_CREATE; //要创建的图片
6. var $TURE_COLOR; //新建一个真彩图象
7. var $PICTURE_WIDTH; //原图片宽度
8. var $PICTURE_HEIGHT; //原图片高度
9. /**
10. * 水印的类型，默认的为水印文字
11. */
12. var $MARK_TYPE = 1;
13. var $WORD; //经过UTF-8后的文字
14. var $WORD_X; //文字横坐标
15. var $WORD_Y; //文字纵坐标
16. var $FONT_TYPE; //字体类型
17. var $FONT_SIZE = "12"; //字体大小
18. var $FONT_WORD; //文字
19. var $ANGLE = 0; //文字的角度，默认为0
20. var $FONT_COLOR = "#000000"; //文字颜色
21. var $FONT_PATH = "font/simkai.ttf"; //字体库，默认为宋体
22. var $FORCE_URL; //水印图片
23. var $FORCE_X = 0; //水印横坐标
24. var $FORCE_Y = 0; //水印纵坐标
25. var $FORCE_START_X = 0; //切起水印的图片横坐标
26. var $FORCE_START_Y = 0; //切起水印的图片纵坐标
27. var $PICTURE_TYPE; //图片类型
28. var $PICTURE_MIME; //输出的头部
29. /**
30. * 缩放比例为1的话就按缩放高度和宽度缩放
31. */
32. var $ZOOM = 1; //缩放类型
33. var $ZOOM_MULTIPLE; //缩放比例
34. var $ZOOM_WIDTH; //缩放宽度
35. var $ZOOM_HEIGHT; //缩放高度
36. /**
37. * 裁切，按比例和固定长度、宽度
38. */
39. var $CUT_TYPE = 1; //裁切类型
40. var $CUT_X = 0; //裁切的横坐标
41. var $CUT_Y = 0; //裁切的纵坐标
42. var $CUT_WIDTH = 100; //裁切的宽度
43. var $CUT_HEIGHT = 100; //裁切的高度
44. /**
45. * 锐化
46. */
47. var $SHARP = "7.0"; //锐化程度
48. /**
49. * 透明度处理
50. */
51. var $ALPHA = '100'; //透明度在0-127之间
52. var $ALPHA_X = "90";
53. var $ALPHA_Y = "50";
54. /**
55. * 任意角度旋转
56. */
57. var $CIRCUMROTATE = "90.0"; //注意，必须为浮点数
58. /**
59. * 出错信息
60. */
61. var $ERROR = array(
62. 'unalviable' => '没有找到相关图片!'
63. );
64. /**
65. * 构造函数：函数初始化
66. */
67. function __construct($PICTURE_URL){
68. $this -> get_info($PICTURE_URL);
69. }
70. function get_info($PICTURE_URL){
71. /**
72. * 处理原图片的信息,先检测图片是否存在,不存在则给出相应的信息
73. */
74. @$SIZE = getimagesize($PICTURE_URL);
75. if(!$SIZE){
76. exit($this -> ERROR['unalviable']);
77. }
78. // 得到原图片的信息类型、宽度、高度
79. $this -> PICTURE_MIME = $SIZE['mime'];
80. $this -> PICTURE_WIDTH = $SIZE[0];
81. $this -> PICTURE_HEIGHT = $SIZE[1];
82. // 创建图片
83. switch($SIZE[2]){
84. case 1:
85. $this -> PICTURE_CREATE = imagecreatefromgif($PICTURE_URL);
86. $this -> PICTURE_TYPE = "imagejpeg";
87. $this -> PICTURE_EXT = "jpg";
88. break;
89. case 2:
90. $this -> PICTURE_CREATE = imagecreatefromjpeg($PICTURE_URL);
91. $this -> PICTURE_TYPE = "imagegif";
92. $this -> PICTURE_EXT = "gif";
93. break;
94. case 3:
95. $this -> PICTURE_CREATE = imagecreatefrompng($PICTURE_URL);
96. $this -> PICTURE_TYPE = "imagepng";
97. $this -> PICTURE_EXT = "png";
98. break;
99. }
100. /**
101. * 文字颜色转换16进制转换成10进制
102. */
103. preg_match_all("/([0-f]){2,2}/i", $this -> FONT_COLOR, $MATCHES);
104. if(count($MATCHES) == 3){
105. $this -> RED = hexdec($MATCHES[0][0]);
106. $this -> GREEN = hexdec($MATCHES[0][1]);
107. $this -> BLUE = hexdec($MATCHES[0][2]);
108. }
109. }
110. # end of __construct
111. /**
112. * 将16进制的颜色转换成10进制的（R，G，B）
113. */
114. function hex2dec(){
115. preg_match_all("/([0-f]){2,2}/i", $this -> FONT_COLOR, $MATCHES);
116. if(count($MATCHES) == 3){
117. $this -> RED = hexdec($MATCHES[0][0]);
118. $this -> GREEN = hexdec($MATCHES[0][1]);
119. $this -> BLUE = hexdec($MATCHES[0][2]);
120. }
121. }
122. // 缩放类型
123. function zoom_type($ZOOM_TYPE){
124. $this -> ZOOM = $ZOOM_TYPE;
125. }
126. // 对图片进行缩放,如果不指定高度和宽度就进行缩放
127. function zoom(){
128. // 缩放的大小
129. if($this -> ZOOM == 0){
130. $this -> ZOOM_WIDTH = $this -> PICTURE_WIDTH * $this -> ZOOM_MULTIPLE;
131. $this -> ZOOM_HEIGHT = $this -> PICTURE_HEIGHT * $this -> ZOOM_MULTIPLE;
132. }
133. // 新建一个真彩图象
134. $this -> TRUE_COLOR = imagecreatetruecolor($this -> ZOOM_WIDTH, $this -> ZOOM_HEIGHT);
135. $WHITE = imagecolorallocate($this -> TRUE_COLOR, 255, 255, 255);
136. imagefilledrectangle($this -> TRUE_COLOR, 0, 0, $this -> ZOOM_WIDTH, $this -> ZOOM_HEIGHT, $WHITE);
137. imagecopyresized($this -> TRUE_COLOR, $this -> PICTURE_CREATE, 0, 0, 0, 0, $this -> ZOOM_WIDTH, $this -> ZOOM_HEIGHT, $this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);
138. }
139. # end of zoom
140. // 裁切图片,按坐标或自动
141. function cut(){
142. $this -> TRUE_COLOR = imagecreatetruecolor($this -> CUT_WIDTH, $this -> CUT_WIDTH);
143. imagecopy($this -> TRUE_COLOR, $this -> PICTURE_CREATE, 0, 0, $this -> CUT_X, $this -> CUT_Y, $this -> CUT_WIDTH, $this -> CUT_HEIGHT);
144. }
145. # end of cut
146. /**
147. * 在图片上放文字或图片
148. * 水印文字
149. */
150. function _mark_text(){
151. $this -> TRUE_COLOR = imagecreatetruecolor($this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);
152. $this -> WORD = mb_convert_encoding($this -> FONT_WORD, 'utf-8', 'gb2312');
153. /**
154. * 取得使用 TrueType 字体的文本的范围
155. */
156. $TEMP = imagettfbbox($this -> FONT_SIZE, 0, $this -> FONT_PATH, $this -> WORD);
157. $WORD_LENGTH = strlen($this -> WORD);
158. $WORD_WIDTH = $TEMP[2] - $TEMP[6];
159. $WORD_HEIGHT = $TEMP[3] - $TEMP[7];
160. /**
161. * 文字水印的默认位置为右下角
162. */
163. if($this -> WORD_X == ""){
164. $this -> WORD_X = $this -> PICTURE_WIDTH - $WORD_WIDTH;
165. }
166. if($this -> WORD_Y == ""){
167. $this -> WORD_Y = $this -> PICTURE_HEIGHT - $WORD_HEIGHT;
168. }
169. imagesettile($this -> TRUE_COLOR, $this -> PICTURE_CREATE);
170. imagefilledrectangle($this -> TRUE_COLOR, 0, 0, $this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT, IMG_COLOR_TILED);
171. $TEXT2 = imagecolorallocate($this -> TRUE_COLOR, $this -> RED, $this -> GREEN, $this -> Blue);
172. imagettftext($this -> TRUE_COLOR, $this -> FONT_SIZE, $this -> ANGLE, $this -> WORD_X, $this -> WORD_Y, $TEXT2, $this -> FONT_PATH, $this -> WORD);
173. }
174. /**
175. * 水印图片
176. */
177. function _mark_picture(){
178. /**
179. * 获取水印图片的信息
180. */
181. @$SIZE = getimagesize($this -> FORCE_URL);
182. if(!$SIZE){
183. exit($this -> ERROR['unalviable']);
184. }
185. $FORCE_PICTURE_WIDTH = $SIZE[0];
186. $FORCE_PICTURE_HEIGHT = $SIZE[1];
187. // 创建水印图片
188. switch($SIZE[2]){
189. case 1:
190. $FORCE_PICTURE_CREATE = imagecreatefromgif($this -> FORCE_URL);
191. $FORCE_PICTURE_TYPE = "gif";
192. break;
193. case 2:
194. $FORCE_PICTURE_CREATE = imagecreatefromjpeg($this -> FORCE_URL);
195. $FORCE_PICTURE_TYPE = "jpg";
196. break;
197. case 3:
198. $FORCE_PICTURE_CREATE = imagecreatefrompng($this -> FORCE_URL);
199. $FORCE_PICTURE_TYPE = "png";
200. break;
201. }
202. /**
203. * 判断水印图片的大小，并生成目标图片的大小，如果水印比图片大，则生成图片大小为水印图片的大小。否则生成的图片大小为原图片大小。
204. */
205. $this -> NEW_PICTURE = $this -> PICTURE_CREATE;
206. if($FORCE_PICTURE_WIDTH > $this -> PICTURE_WIDTH){
207. $CREATE_WIDTH = $FORCE_PICTURE_WIDTH - $this -> FORCE_START_X;
208. }else{
209. $CREATE_WIDTH = $this -> PICTURE_WIDTH;
210. }
211. if($FORCE_PICTURE_HEIGHT > $this -> PICTURE_HEIGHT){
212. $CREATE_HEIGHT = $FORCE_PICTURE_HEIGHT - $this -> FORCE_START_Y;
213. }else{
214. $CREATE_HEIGHT = $this -> PICTURE_HEIGHT;
215. }
216. /**
217. * 创建一个画布
218. */
219. $NEW_PICTURE_CREATE = imagecreatetruecolor($CREATE_WIDTH, $CREATE_HEIGHT);
220. $WHITE = imagecolorallocate($NEW_PICTURE_CREATE, 255, 255, 255);
221. /**
222. * 将背景图拷贝到画布中
223. */
224. imagecopy($NEW_PICTURE_CREATE, $this -> PICTURE_CREATE, 0, 0, 0, 0, $this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);
225. /**
226. * 将目标图片拷贝到背景图片上
227. */
228. imagecopy($NEW_PICTURE_CREATE, $FORCE_PICTURE_CREATE, $this -> FORCE_X, $this -> FORCE_Y, $this -> FORCE_START_X, $this -> FORCE_START_Y, $FORCE_PICTURE_WIDTH, $FORCE_PICTURE_HEIGHT);
229. $this -> TRUE_COLOR = $NEW_PICTURE_CREATE;
230. }
231. # end of mark
232. function alpha_(){
233. $this -> TRUE_COLOR = imagecreatetruecolor($this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);
234. $rgb = "#CDCDCD";
235. $tran_color = "#000000";
236. for($j = 0;$j <= $this -> PICTURE_HEIGHT-1;$j++){
237. for ($i = 0;$i <= $this -> PICTURE_WIDTH-1;$i++)
238. {
239. $rgb = imagecolorat($this -> PICTURE_CREATE, $i, $j);
240. $r = ($rgb >> 16) & 0xFF;
241. $g = ($rgb >> 8) & 0xFF;
242. $b = $rgb & 0xFF;
243. $now_color = imagecolorallocate($this -> PICTURE_CREATE, $r, $g, $b);
244. if ($now_color == $tran_color)
245. {
246. continue;
247. }
248. else
249. {
250. $color = imagecolorallocatealpha($this -> PICTURE_CREATE, $r, $g, $b, $ALPHA);
251. imagesetpixel($this -> PICTURE_CREATE, $ALPHA_X + $i, $ALPHA_Y + $j, $color);
252. }
253. $this -> TRUE_COLOR = $this -> PICTURE_CREATE;
254. }
255. }
256. }
257. /**
258. * 图片旋转:
259. * 沿y轴旋转
260. */
261. function turn_y(){
262. $this -> TRUE_COLOR = imagecreatetruecolor($this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);
263. for ($x = 0; $x < $this -> PICTURE_WIDTH; $x++)
264. {
265. imagecopy($this -> TRUE_COLOR, $this -> PICTURE_CREATE, $this -> PICTURE_WIDTH - $x - 1, 0, $x, 0, 1, $this -> PICTURE_HEIGHT);
266. }
267. }
268. /**
269. * 沿X轴旋转
270. */
271. function turn_x(){
272. $this -> TRUE_COLOR = imagecreatetruecolor($this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);
273. for ($y = 0; $y < $this -> PICTURE_HEIGHT; $y++){
274. imagecopy($this -> TRUE_COLOR, $this -> PICTURE_CREATE, 0, $this -> PICTURE_HEIGHT - $y - 1, 0, $y, $this -> PICTURE_WIDTH, 1);
275. }
276. }
277. /**
278. * 任意角度旋转
279. */
280. function turn(){
281. $this -> TRUE_COLOR = imagecreatetruecolor($this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);
282. imageCopyResized($this -> TRUE_COLOR, $this -> PICTURE_CREATE, 0, 0, 0, 0, $this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT, $this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);
283. $WHITE = imagecolorallocate($this -> TRUE_COLOR, 255, 255, 255);
284. $this -> TRUE_COLOR = imagerotate ($this -> TRUE_COLOR, $this -> CIRCUMROTATE, $WHITE);
285. }
286. /**
287. * 图片锐化
288. */
289. function sharp(){
290. $this -> TRUE_COLOR = imagecreatetruecolor($this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);
291. $cnt = 0;
292. for ($x = 0; $x < $this -> PICTURE_WIDTH; $x++){
293. for ($y = 0; $y < $this -> PICTURE_HEIGHT; $y++){
294. $src_clr1 = imagecolorsforindex($this -> TRUE_COLOR, imagecolorat($this -> PICTURE_CREATE, $x-1, $y-1));
295. $src_clr2 = imagecolorsforindex($this -> TRUE_COLOR, imagecolorat($this -> PICTURE_CREATE, $x, $y));
296. $r = intval($src_clr2["red"] + $this -> SHARP * ($src_clr2["red"] - $src_clr1["red"]));
297. $g = intval($src_clr2["green"] + $this -> SHARP * ($src_clr2["green"] - $src_clr1["green"]));
298. $b = intval($src_clr2["blue"] + $this -> SHARP * ($src_clr2["blue"] - $src_clr1["blue"]));
299. $r = min(255, max($r, 0));
300. $g = min(255, max($g, 0));
301. $b = min(255, max($b, 0));
302. if (($DST_CLR = imagecolorexact($this -> PICTURE_CREATE, $r, $g, $b)) == -1)
303. $DST_CLR = imagecolorallocate($this -> PICTURE_CREATE, $r, $g, $b);
304. $cnt++;
305. if ($DST_CLR == -1) die("color allocate faile at $x, $y ($cnt).");
306. imagesetpixel($this -> TRUE_COLOR, $x, $y, $DST_CLR);
307. }
308. }
309. }
310. /**
311. * 将图片反色处理??
312. */
313. function return_color(){
314. /**
315. * 创建一个画布
316. */
317. $NEW_PICTURE_CREATE = imagecreate($this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);
318. $WHITE = imagecolorallocate($NEW_PICTURE_CREATE, 255, 255, 255);
319. /**
320. * 将背景图拷贝到画布中
321. */
322. imagecopy($NEW_PICTURE_CREATE, $this -> PICTURE_CREATE, 0, 0, 0, 0, $this -> PICTURE_WIDTH, $this -> PICTURE_HEIGHT);
323. $this -> TRUE_COLOR = $NEW_PICTURE_CREATE;
324. }
325. /**
326. * 生成目标图片并显示
327. */
328. function show(){
329. // 判断浏览器,若是IE就不发送头
330. if(isset($_SERVER['HTTP_USER_AGENT']))
331. {
332. $ua = strtoupper($_SERVER['HTTP_USER_AGENT']);
333. if(!preg_match('/^.*MSIE.*\)$/i', $ua))
334. {
335. header("Content-type:$this->PICTURE_MIME");
336. }
337. }
338. $OUT = $this -> PICTURE_TYPE;
339. $OUT($this -> TRUE_COLOR);
340. }
341. /**
342. * 生成目标图片并保存
343. */
344. function save_picture(){
345. // 以 JPEG 格式将图像输出到浏览器或文件
346. $OUT = $this -> PICTURE_TYPE;
347. if(function_exists($OUT)){
348. // 判断浏览器,若是IE就不发送头
349. if(isset($_SERVER['HTTP_USER_AGENT']))
350. {
351. $ua = strtoupper($_SERVER['HTTP_USER_AGENT']);
352. if(!preg_match('/^.*MSIE.*\)$/i', $ua))
353. {
354. header("Content-type:$this->PICTURE_MIME");
355. }
356. }
357. if(!$this -> TRUE_COLOR){
358. exit($this -> ERROR['unavilable']);
359. }else{
360. $OUT($this -> TRUE_COLOR, $this -> DEST_URL);
361. $OUT($this -> TRUE_COLOR);
362. }
363. }
364. }
365. /**
366. * 析构函数：释放图片
367. */
368. function __destruct(){
369. /**
370. * 释放图片
371. */
372. imagedestroy($this -> TRUE_COLOR);
373. imagedestroy($this -> PICTURE_CREATE);
374. }
375. # end of class
376. }
377. ?>

这就是非常强大的php图片处理类，好好收藏，亲，相信以后一定会派上用场的。