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. ?>

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实例化： test.php

3. test

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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. ?>

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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) throw new JSMin_UnterminatedStringException(
178. "JSMin: Unterminated String at byte "
179. . $this->inputIndex . ": {$str}");
180. }
181. $str .= $this->a;
182. if ($this->a === '\\') {
183. $this->output .= $this->a;
184. $this->a = $this->get();
185. $str .= $this->a;
186. }
187. }
188. }
189. // fallthrough
190. case self::ACTION_DELETE_A_B:
191. $this->b = $this->next();
192. if ($this->b === '/' && $this->isRegexpLiteral()) { // RegExp literal
193. $this->output .= $this->a . $this->b;
194. $pattern = '/'; // in case needed for exception
195. while (true) {
196. $this->a = $this->get();
197. $pattern .= $this->a;
198. if ($this->a === '/') { // end pattern
199. break; // while (true)
200. } elseif ($this->a === '\\') {
201. $this->output .= $this->a;
202. $this->a = $this->get();
203. $pattern .= $this->a;
204. } elseif (ord($this->a) throw new JSMin_UnterminatedRegExpException(
205. "JSMin: Unterminated RegExp at byte "
206. . $this->inputIndex .": {$pattern}");
207. }
208. $this->output .= $this->a;
209. }
210. $this->b = $this->next();
211. }
212. // end case ACTION_DELETE_A_B
213. }
214. }
216. protected function isRegexpLiteral()
217. {
218. if (false !== strpos("\n{;(,=:[!&|?", $this->a)) { // we aren't dividing
219. return true;
220. }
221. if (' ' === $this->a) {
222. $length = strlen($this->output);
223. if ($length return true;
224. }
225. // you can't divide a keyword
226. if (preg_match('/(?:case|else|in|return|typeof)$/', $this->output, $m)) {
227. if ($this->output === $m[0]) { // odd but could happen
228. return true;
229. }
230. // make sure it's a keyword, not end of an identifier
231. $charBeforeKeyword = substr($this->output, $length - strlen($m[0]) - 1, 1);
232. if (! $this->isAlphaNum($charBeforeKeyword)) {
233. return true;
234. }
235. }
236. }
237. return false;
238. }
240. /**
241. * Get next char. Convert ctrl char to space.
242. */
243. protected function get()
244. {
245. $c = $this->lookAhead;
246. $this->lookAhead = null;
247. if ($c === null) {
248. if ($this->inputIndex inputLength) {
249. $c = $this->input[$this->inputIndex];
250. $this->inputIndex += 1;
251. } else {
252. return null;
253. }
254. }
255. if ($c === "\r" || $c === "\n") {
256. return "\n";
257. }
258. if (ord($c) return ' ';
259. }
260. return $c;
261. }
263. /**
264. * Get next char. If is ctrl character, translate to a space or newline.
265. */
266. protected function peek()
267. {
268. $this->lookAhead = $this->get();
269. return $this->lookAhead;
270. }
272. /**
273. * Is $c a letter, digit, underscore, dollar sign, escape, or non-ASCII?
274. */
275. protected function isAlphaNum($c)
276. {
277. return (preg_match('/^[0-9a-zA-Z_\\$\\\\]$/', $c) || ord($c) > 126);
278. }
280. protected function singleLineComment()
281. {
282. $comment = '';
283. while (true) {
284. $get = $this->get();
285. $comment .= $get;
286. if (ord($get) // if IE conditional comment
287. if (preg_match('/^\\/@(?:cc_on|if|elif|else|end)\\b/', $comment)) {
288. return "/{$comment}";
289. }
290. return $get;
291. }
292. }
293. }
295. protected function multipleLineComment()
296. {
297. $this->get();
298. $comment = '';
299. while (true) {
300. $get = $this->get();
301. if ($get === '*') {
302. if ($this->peek() === '/') { // end of comment reached
303. $this->get();
304. // if comment preserved by YUI Compressor
305. if (0 === strpos($comment, '!')) {
306. return "\n/*" . substr($comment, 1) . "*/\n";
307. }
308. // if IE conditional comment
309. if (preg_match('/^@(?:cc_on|if|elif|else|end)\\b/', $comment)) {
310. return "/*{$comment}*/";
311. }
312. return ' ';
313. }
314. } elseif ($get === null) {
315. throw new JSMin_UnterminatedCommentException(
316. "JSMin: Unterminated comment at byte "
317. . $this->inputIndex . ": /*{$comment}");
318. }
319. $comment .= $get;
320. }
321. }
323. /**
324. * Get the next character, skipping over comments.
325. * Some comments may be preserved.
326. */
327. protected function next()
328. {
329. $get = $this->get();
330. if ($get !== '/') {
331. return $get;
332. }
333. switch ($this->peek()) {
334. case '/': return $this->singleLineComment();
335. case '*': return $this->multipleLineComment();
336. default: return $get;
337. }
338. }
339. }
341. class JSMin_UnterminatedStringException extends Exception {}
342. class JSMin_UnterminatedCommentException extends Exception {}
343. class JSMin_UnterminatedRegExpException extends Exception {}
344. ?>

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调用示例：

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