压缩多个CSS与JS文件的php代码

2. header('Content-type: text/css');
3. ob_start("compress");
4. function compress($buffer) {
5. /* remove comments */
6. $buffer = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $buffer);
7. /* remove tabs, spaces, newlines, etc. */
8. $buffer = str_replace(array("\r\n", "\r", "\n", "\t", ' ', ' ', ' '), '', $buffer);
9. return $buffer;
10. }
12. /* your css files */
13. include('galleria.css');
14. include('articles.css');
16. ob_end_flush();
17. ?>

实例化： test.php

3. test

2. 压缩js 利用jsmin类 来源：http://code.google.com/p/minify/ compress.php

2. header('Content-type: text/javascript');
3. require 'jsmin.php';
4. echo JSMin::minify(file_get_contents('common.js') . file_get_contents('common2.js'));
5. ?>

common.js alert('first js');

common.js alert('second js');

jsmin.php

2. /**
3. * jsmin.php - extended PHP implementation of Douglas Crockford's JSMin.
4. *
5. *
6. * $minifiedJs = JSMin::minify($js);
7. *
8. *
9. * This is a direct port of jsmin.c to PHP with a few PHP performance tweaks and
10. * modifications to preserve some comments (see below). Also, rather than using
11. * stdin/stdout, JSMin::minify() accepts a string as input and returns another
12. * string as output.
13. *
14. * Comments containing IE conditional compilation are preserved, as are multi-line
15. * comments that begin with "/*!" (for documentation purposes). In the latter case
16. * newlines are inserted around the comment to enhance readability.
17. *
18. * PHP 5 or higher is required.
19. *
20. * Permission is hereby granted to use this version of the library under the
21. * same terms as jsmin.c, which has the following license:
22. *
23. * --
24. * Copyright (c) 2002 Douglas Crockford (www.crockford.com)
25. *
26. * Permission is hereby granted, free of charge, to any person obtaining a copy of
27. * this software and associated documentation files (the "Software"), to deal in
28. * the Software without restriction, including without limitation the rights to
29. * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
30. * of the Software, and to permit persons to whom the Software is furnished to do
31. * so, subject to the following conditions:
32. *
33. * The above copyright notice and this permission notice shall be included in all
34. * copies or substantial portions of the Software.
35. *
36. * The Software shall be used for Good, not Evil.
37. *
38. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
39. * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
40. * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
41. * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
42. * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
43. * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
44. * SOFTWARE.
45. * --
46. *
47. * @package JSMin
48. * @author Ryan Grove (PHP port)
49. * @author Steve Clay (modifications + cleanup)
50. * @author Andrea Giammarchi (spaceBeforeRegExp)
51. * @copyright 2002 Douglas Crockford (jsmin.c)
52. * @copyright 2008 Ryan Grove (PHP port)
53. * @license http://opensource.org/licenses/mit-license.php MIT License
54. * @link http://code.google.com/p/jsmin-php/
55. */
57. class JSMin {
58. const ORD_LF = 10;
59. const ORD_SPACE = 32;
60. const ACTION_KEEP_A = 1;
61. const ACTION_DELETE_A = 2;
62. const ACTION_DELETE_A_B = 3;
64. protected $a = "\n";
65. protected $b = '';
66. protected $input = '';
67. protected $inputIndex = 0;
68. protected $inputLength = 0;
69. protected $lookAhead = null;
70. protected $output = '';
72. /**
73. * Minify Javascript
74. *
75. * @param string $js Javascript to be minified
76. * @return string
77. */
78. public static function minify($js)
79. {
80. // look out for syntax like "++ +" and "- ++"
81. $p = '\\+';
82. $m = '\\-';
83. if (preg_match("/([$p$m])(?:\\1 [$p$m]| (?:$p$p|$m$m))/", $js)) {
84. // likely pre-minified and would be broken by JSMin
85. return $js;
86. }
87. $jsmin = new JSMin($js);
88. return $jsmin->min();
89. }
91. /*
92. * Don't create a JSMin instance, instead use the static function minify,
93. * which checks for mb_string function overloading and avoids errors
94. * trying to re-minify the output of Closure Compiler
95. *
96. * @private
97. */
98. public function __construct($input)
99. {
100. $this->input = $input;
101. }
103. /**
104. * Perform minification, return result
105. */
106. public function min()
107. {
108. if ($this->output !== '') { // min already run
109. return $this->output;
110. }
112. $mbIntEnc = null;
113. if (function_exists('mb_strlen') && ((int)ini_get('mbstring.func_overload') & 2)) {
114. $mbIntEnc = mb_internal_encoding();
115. mb_internal_encoding('8bit');
116. }
117. $this->input = str_replace("\r\n", "\n", $this->input);
118. $this->inputLength = strlen($this->input);
120. $this->action(self::ACTION_DELETE_A_B);
122. while ($this->a !== null) {
123. // determine next command
124. $command = self::ACTION_KEEP_A; // default
125. if ($this->a === ' ') {
126. if (! $this->isAlphaNum($this->b)) {
127. $command = self::ACTION_DELETE_A;
128. }
129. } elseif ($this->a === "\n") {
130. if ($this->b === ' ') {
131. $command = self::ACTION_DELETE_A_B;
132. // in case of mbstring.func_overload & 2, must check for null b,
133. // otherwise mb_strpos will give WARNING
134. } elseif ($this->b === null
135. || (false === strpos('{[(+-', $this->b)
136. && ! $this->isAlphaNum($this->b))) {
137. $command = self::ACTION_DELETE_A;
138. }
139. } elseif (! $this->isAlphaNum($this->a)) {
140. if ($this->b === ' '
141. || ($this->b === "\n"
142. && (false === strpos('}])+-"\'', $this->a)))) {
143. $command = self::ACTION_DELETE_A_B;
144. }
145. }
146. $this->action($command);
147. }
148. $this->output = trim($this->output);
150. if ($mbIntEnc !== null) {
151. mb_internal_encoding($mbIntEnc);
152. }
153. return $this->output;
154. }
156. /**
157. * ACTION_KEEP_A = Output A. Copy B to A. Get the next B.
158. * ACTION_DELETE_A = Copy B to A. Get the next B.
159. * ACTION_DELETE_A_B = Get the next B.
160. */
161. protected function action($command)
162. {
163. switch ($command) {
164. case self::ACTION_KEEP_A:
165. $this->output .= $this->a;
166. // fallthrough
167. case self::ACTION_DELETE_A:
168. $this->a = $this->b;
169. if ($this->a === "'" || $this->a === '"') { // string literal
170. $str = $this->a; // in case needed for exception
171. while (true) {
172. $this->output .= $this->a;
173. $this->a = $this->get();
174. if ($this->a === $this->b) { // end quote
175. break;
176. }
177. if (ord($this->a) <= self::ORD_LF) {
178. throw new JSMin_UnterminatedStringException(
179. "JSMin: Unterminated String at byte "
180. . $this->inputIndex . ": {$str}");
181. }
182. $str .= $this->a;
183. if ($this->a === '\\') {
184. $this->output .= $this->a;
185. $this->a = $this->get();
186. $str .= $this->a;
187. }
188. }
189. }
190. // fallthrough
191. case self::ACTION_DELETE_A_B:
192. $this->b = $this->next();
193. if ($this->b === '/' && $this->isRegexpLiteral()) { // RegExp literal
194. $this->output .= $this->a . $this->b;
195. $pattern = '/'; // in case needed for exception
196. while (true) {
197. $this->a = $this->get();
198. $pattern .= $this->a;
199. if ($this->a === '/') { // end pattern
200. break; // while (true)
201. } elseif ($this->a === '\\') {
202. $this->output .= $this->a;
203. $this->a = $this->get();
204. $pattern .= $this->a;
205. } elseif (ord($this->a) <= self::ORD_LF) {
206. throw new JSMin_UnterminatedRegExpException(
207. "JSMin: Unterminated RegExp at byte "
208. . $this->inputIndex .": {$pattern}");
209. }
210. $this->output .= $this->a;
211. }
212. $this->b = $this->next();
213. }
214. // end case ACTION_DELETE_A_B
215. }
216. }
218. protected function isRegexpLiteral()
219. {
220. if (false !== strpos("\n{;(,=:[!&|?", $this->a)) { // we aren't dividing
221. return true;
222. }
223. if (' ' === $this->a) {
224. $length = strlen($this->output);
225. if ($length < 2) { // weird edge case
226. return true;
227. }
228. // you can't divide a keyword
229. if (preg_match('/(?:case|else|in|return|typeof)$/', $this->output, $m)) {
230. if ($this->output === $m[0]) { // odd but could happen
231. return true;
232. }
233. // make sure it's a keyword, not end of an identifier
234. $charBeforeKeyword = substr($this->output, $length - strlen($m[0]) - 1, 1);
235. if (! $this->isAlphaNum($charBeforeKeyword)) {
236. return true;
237. }
238. }
239. }
240. return false;
241. }
243. /**
244. * Get next char. Convert ctrl char to space.
245. */
246. protected function get()
247. {
248. $c = $this->lookAhead;
249. $this->lookAhead = null;
250. if ($c === null) {
251. if ($this->inputIndex < $this->inputLength) {
252. $c = $this->input[$this->inputIndex];
253. $this->inputIndex += 1;
254. } else {
255. return null;
256. }
257. }
258. if ($c === "\r" || $c === "\n") {
259. return "\n";
260. }
261. if (ord($c) < self::ORD_SPACE) { // control char
262. return ' ';
263. }
264. return $c;
265. }
267. /**
268. * Get next char. If is ctrl character, translate to a space or newline.
269. */
270. protected function peek()
271. {
272. $this->lookAhead = $this->get();
273. return $this->lookAhead;
274. }
276. /**
277. * Is $c a letter, digit, underscore, dollar sign, escape, or non-ASCII?
278. */
279. protected function isAlphaNum($c)
280. {
281. return (preg_match('/^[0-9a-zA-Z_\\$\\\\]$/', $c) || ord($c) > 126);
282. }
284. protected function singleLineComment()
285. {
286. $comment = '';
287. while (true) {
288. $get = $this->get();
289. $comment .= $get;
290. if (ord($get) <= self::ORD_LF) { // EOL reached
291. // if IE conditional comment
292. if (preg_match('/^\\/@(?:cc_on|if|elif|else|end)\\b/', $comment)) {
293. return "/{$comment}";
294. }
295. return $get;
296. }
297. }
298. }
300. protected function multipleLineComment()
301. {
302. $this->get();
303. $comment = '';
304. while (true) {
305. $get = $this->get();
306. if ($get === '*') {
307. if ($this->peek() === '/') { // end of comment reached
308. $this->get();
309. // if comment preserved by YUI Compressor
310. if (0 === strpos($comment, '!')) {
311. return "\n/*" . substr($comment, 1) . "*/\n";
312. }
313. // if IE conditional comment
314. if (preg_match('/^@(?:cc_on|if|elif|else|end)\\b/', $comment)) {
315. return "/*{$comment}*/";
316. }
317. return ' ';
318. }
319. } elseif ($get === null) {
320. throw new JSMin_UnterminatedCommentException(
321. "JSMin: Unterminated comment at byte "
322. . $this->inputIndex . ": /*{$comment}");
323. }
324. $comment .= $get;
325. }
326. }
328. /**
329. * Get the next character, skipping over comments.
330. * Some comments may be preserved.
331. */
332. protected function next()
333. {
334. $get = $this->get();
335. if ($get !== '/') {
336. return $get;
337. }
338. switch ($this->peek()) {
339. case '/': return $this->singleLineComment();
340. case '*': return $this->multipleLineComment();
341. default: return $get;
342. }
343. }
344. }
346. class JSMin_UnterminatedStringException extends Exception {}
347. class JSMin_UnterminatedCommentException extends Exception {}
348. class JSMin_UnterminatedRegExpException extends Exception {}
349. ?>

调用示例：