用来自动压缩js文件的php代码

2. /* 9 April 2008. version 1.1
3. *
4. * This is the php version of the Dean Edwards JavaScript's Packer,
5. * Based on :
6. *
7. * ParseMaster, version 1.0.2 (2005-08-19) Copyright 2005, Dean Edwards
8. * a multi-pattern parser.
9. * KNOWN BUG: erroneous behavior when using escapeChar with a replacement
10. * value that is a function
11. *
12. * packer, version 2.0.2 (2005-08-19) Copyright 2004-2005, Dean Edwards
13. *
14. * License: http://creativecommons.org/licenses/LGPL/2.1/
15. *
16. * Ported to PHP by Nicolas Martin.
17. *
18. * ----------------------------------------------------------------------
19. * changelog:
20. * 1.1 : correct a bug, '/0' packed then unpacked becomes '/'.
21. * ----------------------------------------------------------------------
22. *
23. * examples of usage :
24. * $myPacker = new JavaScriptPacker($script, 62, true, false);
25. * $packed = $myPacker->pack();
26. *
27. * or
28. *
29. * $myPacker = new JavaScriptPacker($script, 'Normal', true, false);
30. * $packed = $myPacker->pack();
31. *
32. * or (default values)
33. *
34. * $myPacker = new JavaScriptPacker($script);
35. * $packed = $myPacker->pack();
36. *
37. *
38. * params of the constructor :
39. * $script: the JavaScript to pack, string.
40. * $encoding: level of encoding, int or string :
41. * 0,10,62,95 or 'None', 'Numeric', 'Normal', 'High ASCII'.
42. * default: 62.
43. * $fastDecode: include the fast decoder in the packed result, boolean.
44. * default : true.
45. * $specialChars: if you are flagged your private and local variables
46. * in the script, boolean.
47. * default: false.
48. *
49. * The pack() method return the compressed JavasScript, as a string.
50. *
51. * see http://dean.edwards.name/packer/usage/ for more information.
52. *
53. * Notes :
54. * # need PHP 5 . Tested with PHP 5.1.2, 5.1.3, 5.1.4, 5.2.3
55. *
56. * # The packed result may be different than with the Dean Edwards
57. * version, but with the same length. The reason is that the PHP
58. * function usort to sort array don't necessarily preserve the
59. * original order of two equal member. The Javascript sort function
60. * in fact preserve this order (but that's not require by the
61. * ECMAScript standard). So the encoded keywords order can be
62. * different in the two results.
63. *
64. * # Be careful with the 'High ASCII' Level encoding if you use
65. * UTF-8 in your files...
66. */
68. class JavaScriptPacker {
69. // constants
70. const IGNORE = '$1';
71. // validate parameters
72. private $_script = '';
73. private $_encoding = 62;
74. private $_fastDecode = true;
75. private $_specialChars = false;
77. private $LITERAL_ENCODING = array(
78. 'None' => 0,
79. 'Numeric' => 10,
80. 'Normal' => 62,
81. 'High ASCII' => 95
82. );
84. public function __construct($_script, $_encoding = 62, $_fastDecode = true, $_specialChars = false)
85. {
86. $this->_script = $_script . "/n";
87. if (array_key_exists($_encoding, $this->LITERAL_ENCODING))
88. $_encoding = $this->LITERAL_ENCODING[$_encoding];
89. $this->_encoding = min((int)$_encoding, 95);
90. $this->_fastDecode = $_fastDecode;
91. $this->_specialChars = $_specialChars;
92. }
94. public function pack() {
95. $this->_addParser('_basicCompression');
96. if ($this->_specialChars)
97. $this->_addParser('_encodeSpecialChars');
98. if ($this->_encoding)
99. $this->_addParser('_encodeKeywords');
101. // go!
102. return $this->_pack($this->_script);
103. }
105. // apply all parsing routines
106. private function _pack($script) {
107. for ($i = 0; isset($this->_parsers[$i]); $i++) {
108. $script = call_user_func(array(&$this,$this->_parsers[$i]), $script);
109. }
110. return $script;
111. }
113. // keep a list of parsing functions, they'll be executed all at once
114. private $_parsers = array();
115. private function _addParser($parser) {
116. $this->_parsers[] = $parser;
117. }
119. // zero encoding - just removal of white space and comments
120. private function _basicCompression($script) {
121. $parser = new ParseMaster();
122. // make safe
123. $parser->escapeChar = '//';
124. // protect strings
125. $parser->add('//'[^/'//n//r]*/'/', self::IGNORE);
126. $parser->add('/"[^"//n//r]*"/', self::IGNORE);
127. // remove comments
128. $parser->add('///////[^//n//r]*[//n//r]/', ' ');
129. $parser->add('//////*[^*]*//*+([^///][^*]*//*+)*////', ' ');
130. // protect regular expressions
131. $parser->add('///s+(///[^/////n//r//*][^/////n//r]*///g?i?)/', '$2'); // IGNORE
132. $parser->add('/[^//w//x24////'"*)//?:]///[^/////n//r//*][^/////n//r]*///g?i?/', self::IGNORE);
133. // remove: ;;; doSomething();
134. if ($this->_specialChars) $parser->add('/;;;[^//n//r]+[//n//r]/');
135. // remove redundant semi-colons
136. $parser->add('///(;;//)/', self::IGNORE); // protect for (;;) loops
137. $parser->add('/;+//s*([};])/', '$2');
138. // apply the above
139. $script = $parser->exec($script);
140. // remove white-space
141. $parser->add('/(//b|//x24)//s+(//b|//x24)/', '$2 $3');
142. $parser->add('/([+//-])//s+([+//-])/', '$2 $3');
143. $parser->add('///s+/', '');
144. // done
145. return $parser->exec($script);
146. }
148. private function _encodeSpecialChars($script) {
149. $parser = new ParseMaster();
150. // replace: $name -> n, $$name -> na
151. $parser->add('/((//x24+)([a-zA-Z$_]+))(//d*)/',
152. array('fn' => '_replace_name')
153. );
154. // replace: _name -> _0, double-underscore (__name) is ignored
155. $regexp = '///b_[A-Za-z//d]//w*/';
156. // build the word list
157. $keywords = $this->_analyze($script, $regexp, '_encodePrivate');
158. // quick ref
159. $encoded = $keywords['encoded'];
161. $parser->add($regexp,
162. array(
163. 'fn' => '_replace_encoded',
164. 'data' => $encoded
165. )
166. );
167. return $parser->exec($script);
168. }
170. private function _encodeKeywords($script) {
171. // escape high-ascii values already in the script (i.e. in strings)
172. if ($this->_encoding > 62)
173. $script = $this->_escape95($script);
174. // create the parser
175. $parser = new ParseMaster();
176. $encode = $this->_getEncoder($this->_encoding);
177. // for high-ascii, don't encode single character low-ascii
178. $regexp = ($this->_encoding > 62) ? '///w//w+/' : '///w+/';
179. // build the word list
180. $keywords = $this->_analyze($script, $regexp, $encode);
181. $encoded = $keywords['encoded'];
183. // encode
184. $parser->add($regexp,
185. array(
186. 'fn' => '_replace_encoded',
187. 'data' => $encoded
188. )
189. );
190. if (emptyempty($script)) return $script;
191. else {
192. //$res = $parser->exec($script);
193. //$res = $this->_bootStrap($res, $keywords);
194. //return $res;
195. return $this->_bootStrap($parser->exec($script), $keywords);
196. }
197. }
199. private function _analyze($script, $regexp, $encode) {
200. // analyse
201. // retreive all words in the script
202. $all = array();
203. preg_match_all($regexp, $script, $all);
204. $_sorted = array(); // list of words sorted by frequency
205. $_encoded = array(); // dictionary of word->encoding
206. $_protected = array(); // instances of "protected" words
207. $all = $all[0]; // simulate the javascript comportement of global match
208. if (!emptyempty($all)) {
209. $unsorted = array(); // same list, not sorted
210. $protected = array(); // "protected" words (dictionary of word->"word")
211. $value = array(); // dictionary of charCode->encoding (eg. 256->ff)
212. $this->_count = array(); // word->count
213. $i = count($all); $j = 0; //$word = null;
214. // count the occurrences - used for sorting later
215. do {
216. --$i;
217. $word = '$' . $all[$i];
218. if (!isset($this->_count[$word])) {
219. $this->_count[$word] = 0;
220. $unsorted[$j] = $word;
221. // make a dictionary of all of the protected words in this script
222. // these are words that might be mistaken for encoding
223. //if (is_string($encode) && method_exists($this, $encode))
224. $values[$j] = call_user_func(array(&$this, $encode), $j);
225. $protected['$' . $values[$j]] = $j++;
226. }
227. // increment the word counter
228. $this->_count[$word]++;
229. } while ($i > 0);
230. // prepare to sort the word list, first we must protect
231. // words that are also used as codes. we assign them a code
232. // equivalent to the word itself.
233. // e.g. if "do" falls within our encoding range
234. // then we store keywords["do"] = "do";
235. // this avoids problems when decoding
236. $i = count($unsorted);
237. do {
238. $word = $unsorted[--$i];
239. if (isset($protected[$word]) /*!= null*/) {
240. $_sorted[$protected[$word]] = substr($word, 1);
241. $_protected[$protected[$word]] = true;
242. $this->_count[$word] = 0;
243. }
244. } while ($i);
246. // sort the words by frequency
247. // Note: the javascript and php version of sort can be different :
248. // in php manual, usort :
249. // " If two members compare as equal,
250. // their order in the sorted array is undefined."
251. // so the final packed script is different of the Dean's javascript version
252. // but equivalent.
253. // the ECMAscript standard does not guarantee this behaviour,
254. // and thus not all browsers (e.g. Mozilla versions dating back to at
255. // least 2003) respect this.
256. usort($unsorted, array(&$this, '_sortWords'));
257. $j = 0;
258. // because there are "protected" words in the list
259. // we must add the sorted words around them
260. do {
261. if (!isset($_sorted[$i]))
262. $_sorted[$i] = substr($unsorted[$j++], 1);
263. $_encoded[$_sorted[$i]] = $values[$i];
264. } while (++$i < count($unsorted));
265. }
266. return array(
267. 'sorted' => $_sorted,
268. 'encoded' => $_encoded,
269. 'protected' => $_protected);
270. }
272. private $_count = array();
273. private function _sortWords($match1, $match2) {
274. return $this->_count[$match2] - $this->_count[$match1];
275. }
277. // build the boot function used for loading and decoding
278. private function _bootStrap($packed, $keywords) {
279. $ENCODE = $this->_safeRegExp('$encode//($count//)');
280. // $packed: the packed script
281. $packed = "'" . $this->_escape($packed) . "'";
282. // $ascii: base for encoding
283. $ascii = min(count($keywords['sorted']), $this->_encoding);
284. if ($ascii == 0) $ascii = 1;
285. // $count: number of words contained in the script
286. $count = count($keywords['sorted']);
287. // $keywords: list of words contained in the script
288. foreach ($keywords['protected'] as $i=>$value) {
289. $keywords['sorted'][$i] = '';
290. }
291. // convert from a string to an array
292. ksort($keywords['sorted']);
293. $keywords = "'" . implode('|',$keywords['sorted']) . "'.split('|')";
294. $encode = ($this->_encoding > 62) ? '_encode95' : $this->_getEncoder($ascii);
295. $encode = $this->_getJSFunction($encode);
296. $encode = preg_replace('/_encoding/','$ascii', $encode);
297. $encode = preg_replace('/arguments//.callee/','$encode', $encode);
298. $inline = '//$count' . ($ascii > 10 ? '.toString(//$ascii)' : '');
299. // $decode: code snippet to speed up decoding
300. if ($this->_fastDecode) {
301. // create the decoder
302. $decode = $this->_getJSFunction('_decodeBody');
303. if ($this->_encoding > 62)
304. $decode = preg_replace('/////w/', '[//xa1-//xff]', $decode);
305. // perform the encoding inline for lower ascii values
306. elseif ($ascii < 36)
307. $decode = preg_replace($ENCODE, $inline, $decode);
308. // special case: when $count==0 there are no keywords. I want to keep
309. // the basic shape of the unpacking funcion so i'll frig the code...
310. if ($count == 0)
311. $decode = preg_replace($this->_safeRegExp('($count)//s*=//s*1'), '$1=0', $decode, 1);
312. }
313. // boot function
314. $unpack = $this->_getJSFunction('_unpack');
315. if ($this->_fastDecode) {
316. // insert the decoder
317. $this->buffer = $decode;
318. $unpack = preg_replace_callback('///{/', array(&$this, '_insertFastDecode'), $unpack, 1);
319. }
320. $unpack = preg_replace('/"/', "'", $unpack);
321. if ($this->_encoding > 62) { // high-ascii
322. // get rid of the word-boundaries for regexp matches
323. $unpack = preg_replace('//'////////b/'/s*//+|//+/s*/'////////b/'/', '', $unpack);
324. }
325. if ($ascii > 36 || $this->_encoding > 62 || $this->_fastDecode) {
326. // insert the encode function
327. $this->buffer = $encode;
328. $unpack = preg_replace_callback('///{/', array(&$this, '_insertFastEncode'), $unpack, 1);
329. } else {
330. // perform the encoding inline
331. $unpack = preg_replace($ENCODE, $inline, $unpack);
332. }
333. // pack the boot function too
334. $unpackPacker = new JavaScriptPacker($unpack, 0, false, true);
335. $unpack = $unpackPacker->pack();
337. // arguments
338. $params = array($packed, $ascii, $count, $keywords);
339. if ($this->_fastDecode) {
340. $params[] = 0;
341. $params[] = '{}';
342. }
343. $params = implode(',', $params);
345. // the whole thing
346. return 'eval(' . $unpack . '(' . $params . "))/n";
347. }
349. private $buffer;
350. private function _insertFastDecode($match) {
351. return '{' . $this->buffer . ';';
352. }
353. private function _insertFastEncode($match) {
354. return '{$encode=' . $this->buffer . ';';
355. }
357. // mmm.. ..which one do i need ??
358. private function _getEncoder($ascii) {
359. return $ascii > 10 ? $ascii > 36 ? $ascii > 62 ?
360. '_encode95' : '_encode62' : '_encode36' : '_encode10';
361. }
363. // zero encoding
364. // characters: 0123456789
365. private function _encode10($charCode) {
366. return $charCode;
367. }
369. // inherent base36 support
370. // characters: 0123456789abcdefghijklmnopqrstuvwxyz
371. private function _encode36($charCode) {
372. return base_convert($charCode, 10, 36);
373. }
375. // hitch a ride on base36 and add the upper case alpha characters
376. // characters: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
377. private function _encode62($charCode) {
378. $res = '';
379. if ($charCode >= $this->_encoding) {
380. $res = $this->_encode62((int)($charCode / $this->_encoding));
381. }
382. $charCode = $charCode % $this->_encoding;
384. if ($charCode > 35)
385. return $res . chr($charCode + 29);
386. else
387. return $res . base_convert($charCode, 10, 36);
388. }
390. // use high-ascii values
391. // characters: ?￠￡¤￥|§¨?a??-?ˉ°±23′μ?·?1o?????àá??????èéê?ìí??D?òó???×?ùú?üYT?àáa?????èéê?ìí??e?òó???÷?ùú?üyt
392. private function _encode95($charCode) {
393. $res = '';
394. if ($charCode >= $this->_encoding)
395. $res = $this->_encode95($charCode / $this->_encoding);
397. return $res . chr(($charCode % $this->_encoding) + 161);
398. }
400. private function _safeRegExp($string) {
401. return '/'.preg_replace('//$/', '///$', $string).'/';
402. }
404. private function _encodePrivate($charCode) {
405. return "_" . $charCode;
406. }
408. // protect characters used by the parser
409. private function _escape($script) {
410. return preg_replace('/([/////'])/', '///$1', $script);
411. }
413. // protect high-ascii characters already in the script
414. private function _escape95($script) {
415. return preg_replace_callback(
416. '/[//xa1-//xff]/',
417. array(&$this, '_escape95Bis'),
418. $script
419. );
420. }
421. private function _escape95Bis($match) {
422. return '/x'.((string)dechex(ord($match)));
423. }
426. private function _getJSFunction($aName) {
427. if (defined('self::JSFUNCTION'.$aName))
428. return constant('self::JSFUNCTION'.$aName);
429. else
430. return '';
431. }
433. // JavaScript Functions used.
434. // Note : In Dean's version, these functions are converted
435. // with 'String(aFunctionName);'.
436. // This internal conversion complete the original code, ex :
437. // 'while (aBool) anAction();' is converted to
438. // 'while (aBool) { anAction(); }'.
439. // The JavaScript functions below are corrected.
441. // unpacking function - this is the boot strap function
442. // data extracted from this packing routine is passed to
443. // this function when decoded in the target
444. // NOTE ! : without the ';' final.
445. const JSFUNCTION_unpack =
446. 'function($packed, $ascii, $count, $keywords, $encode, $decode) {
447. while ($count--) {
448. if ($keywords[$count]) {
449. $packed = $packed.replace(new RegExp(/'////b/' + $encode($count) + /'////b/', /'g/'), $keywords[$count]);
450. }
451. }
452. return $packed;
453. }';
454. /*
455. 'function($packed, $ascii, $count, $keywords, $encode, $decode) {
456. while ($count--)
457. if ($keywords[$count])
458. $packed = $packed.replace(new RegExp(/'////b/' + $encode($count) + /'////b/', /'g/'), $keywords[$count]);
459. return $packed;
460. }';
461. */
463. // code-snippet inserted into the unpacker to speed up decoding
464. const JSFUNCTION_decodeBody =
465. //_decode = function() {
466. // does the browser support String.replace where the
467. // replacement value is a function?
468. ' if (!/'/'.replace(/^/, String)) {
469. // decode all the values we need
470. while ($count--) {
471. $decode[$encode($count)] = $keywords[$count] || $encode($count);
472. }
473. // global replacement function
474. $keywords = [function ($encoded) {return $decode[$encoded]}];
475. // generic match
476. $encode = function () {return /'////w+/'};
477. // reset the loop counter - we are now doing a global replace
478. $count = 1;
479. }
480. ';
481. //};
482. /*
483. ' if (!/'/'.replace(/^/, String)) {
484. // decode all the values we need
485. while ($count--) $decode[$encode($count)] = $keywords[$count] || $encode($count);
486. // global replacement function
487. $keywords = [function ($encoded) {return $decode[$encoded]}];
488. // generic match
489. $encode = function () {return/'////w+/'};
490. // reset the loop counter - we are now doing a global replace
491. $count = 1;
492. }';
493. */
495. // zero encoding
496. // characters: 0123456789
497. const JSFUNCTION_encode10 =
498. 'function($charCode) {
499. return $charCode;
500. }';//;';
502. // inherent base36 support
503. // characters: 0123456789abcdefghijklmnopqrstuvwxyz
504. const JSFUNCTION_encode36 =
505. 'function($charCode) {
506. return $charCode.toString(36);
507. }';//;';
509. // hitch a ride on base36 and add the upper case alpha characters
510. // characters: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
511. const JSFUNCTION_encode62 =
512. 'function($charCode) {
513. return ($charCode < _encoding ? /'/' : arguments.callee(parseInt($charCode / _encoding))) +
514. (($charCode = $charCode % _encoding) > 35 ? String.fromCharCode($charCode + 29) : $charCode.toString(36));
515. }';
517. // use high-ascii values
518. // characters: ?￠￡¤￥|§¨?a??-?ˉ°±23′μ?·?1o?????àá??????èéê?ìí??D?òó???×?ùú?üYT?àáa?????èéê?ìí??e?òó???÷?ùú?üyt
519. const JSFUNCTION_encode95 =
520. 'function($charCode) {
521. return ($charCode < _encoding ? /'/' : arguments.callee($charCode / _encoding)) +
522. String.fromCharCode($charCode % _encoding + 161);
523. }';
525. }
527. class ParseMaster {
528. public $ignoreCase = false;
529. public $escapeChar = '';
531. // constants
532. const EXPRESSION = 0;
533. const REPLACEMENT = 1;
534. const LENGTH = 2;
536. // used to determine nesting levels
537. private $GROUPS = '///(/';//g
538. private $SUB_REPLACE = '///$//d/';
539. private $INDEXED = '/^//$//d+$/';
540. private $TRIM = '/([/'"])//1//.(.*)//.//1//1$/';
541. private $ESCAPE = '////./';//g
542. private $QUOTE = '//'/';
543. private $DELETED = '///x01[^//x01]*//x01/';//g
545. public function add($expression, $replacement = '') {
546. // count the number of sub-expressions
547. // - add one because each pattern is itself a sub-expression
548. $length = 1 + preg_match_all($this->GROUPS, $this->_internalEscape((string)$expression), $out);
550. // treat only strings $replacement
551. if (is_string($replacement)) {
552. // does the pattern deal with sub-expressions?
553. if (preg_match($this->SUB_REPLACE, $replacement)) {
554. // a simple lookup? (e.g. "$2")
555. if (preg_match($this->INDEXED, $replacement)) {
556. // store the index (used for fast retrieval of matched strings)
557. $replacement = (int)(substr($replacement, 1)) - 1;
558. } else { // a complicated lookup (e.g. "Hello $2 $1")
559. // build a function to do the lookup
560. $quote = preg_match($this->QUOTE, $this->_internalEscape($replacement))
561. ? '"' : "'";
562. $replacement = array(
563. 'fn' => '_backReferences',
564. 'data' => array(
565. 'replacement' => $replacement,
566. 'length' => $length,
567. 'quote' => $quote
568. )
569. );
570. }
571. }
572. }
573. // pass the modified arguments
574. if (!emptyempty($expression)) $this->_add($expression, $replacement, $length);
575. else $this->_add('/^$/', $replacement, $length);
576. }
578. public function exec($string) {
579. // execute the global replacement
580. $this->_escaped = array();
582. // simulate the _patterns.toSTring of Dean
583. $regexp = '/';
584. foreach ($this->_patterns as $reg) {
585. $regexp .= '(' . substr($reg[self::EXPRESSION], 1, -1) . ')|';
586. }
587. $regexp = substr($regexp, 0, -1) . '/';
588. $regexp .= ($this->ignoreCase) ? 'i' : '';
590. $string = $this->_escape($string, $this->escapeChar);
591. $string = preg_replace_callback(
592. $regexp,
593. array(
594. &$this,
595. '_replacement'
596. ),
597. $string
598. );
599. $string = $this->_unescape($string, $this->escapeChar);
601. return preg_replace($this->DELETED, '', $string);
602. }
604. public function reset() {
605. // clear the patterns collection so that this object may be re-used
606. $this->_patterns = array();
607. }
608. // private
609. private $_escaped = array(); // escaped characters
610. private $_patterns = array(); // patterns stored by index
612. // create and add a new pattern to the patterns collection
613. private function _add() {
614. $arguments = func_get_args();
615. $this->_patterns[] = $arguments;
616. }
618. // this is the global replace function (it's quite complicated)
619. private function _replacement($arguments) {
620. if (emptyempty($arguments)) return '';
622. $i = 1; $j = 0;
623. // loop through the patterns
624. while (isset($this->_patterns[$j])) {
625. $pattern = $this->_patterns[$j++];
626. // do we have a result?
627. if (isset($arguments[$i]) && ($arguments[$i] != '')) {
628. $replacement = $pattern[self::REPLACEMENT];
630. if (is_array($replacement) && isset($replacement['fn'])) {
632. if (isset($replacement['data'])) $this->buffer = $replacement['data'];
633. return call_user_func(array(&$this, $replacement['fn']), $arguments, $i);
635. } elseif (is_int($replacement)) {
636. return $arguments[$replacement + $i];
638. }
639. $delete = ($this->escapeChar == '' ||
640. strpos($arguments[$i], $this->escapeChar) === false)
641. ? '' : "/x01" . $arguments[$i] . "/x01";
642. return $delete . $replacement;
644. // skip over references to sub-expressions
645. } else {
646. $i += $pattern[self::LENGTH];
647. }
648. }
649. }
651. private function _backReferences($match, $offset) {
652. $replacement = $this->buffer['replacement'];
653. $quote = $this->buffer['quote'];
654. $i = $this->buffer['length'];
655. while ($i) {
656. $replacement = str_replace('$'.$i--, $match[$offset + $i], $replacement);
657. }
658. return $replacement;
659. }
661. private function _replace_name($match, $offset){
662. $length = strlen($match[$offset + 2]);
663. $start = $length - max($length - strlen($match[$offset + 3]), 0);
664. return substr($match[$offset + 1], $start, $length) . $match[$offset + 4];
665. }
667. private function _replace_encoded($match, $offset) {
668. return $this->buffer[$match[$offset]];
669. }
672. // php : we cannot pass additional data to preg_replace_callback,
673. // and we cannot use &$this in create_function, so let's go to lower level
674. private $buffer;
676. // encode escaped characters
677. private function _escape($string, $escapeChar) {
678. if ($escapeChar) {
679. $this->buffer = $escapeChar;
680. return preg_replace_callback(
681. '///' . $escapeChar . '(.)' .'/',
682. array(&$this, '_escapeBis'),
683. $string
684. );
686. } else {
687. return $string;
688. }
689. }
690. private function _escapeBis($match) {
691. $this->_escaped[] = $match[1];
692. return $this->buffer;
693. }
695. // decode escaped characters
696. private function _unescape($string, $escapeChar) {
697. if ($escapeChar) {
698. $regexp = '/'.'//'.$escapeChar.'/';
699. $this->buffer = array('escapeChar'=> $escapeChar, 'i' => 0);
700. return preg_replace_callback
701. (
702. $regexp,
703. array(&$this, '_unescapeBis'),
704. $string
705. );
707. } else {
708. return $string;
709. }
710. }
711. private function _unescapeBis() {
712. if (isset($this->_escaped[$this->buffer['i']])
713. && $this->_escaped[$this->buffer['i']] != '')
714. {
715. $temp = $this->_escaped[$this->buffer['i']];
716. } else {
717. $temp = '';
718. }
719. $this->buffer['i']++;
720. return $this->buffer['escapeChar'] . $temp;
721. }
723. private function _internalEscape($string) {
724. return preg_replace($this->ESCAPE, '', $string);
725. }
726. }
727. ?>

2、执行压缩的PHP文件 pack_js_file.php

2. require 'tom-class.JavaScriptPacker.php';
3. $t1 = microtime(true);
4. $source_dir = realpath(dirname(__FILE__)."/..")."/common/script_unpacked";
5. $out_dir = realpath(dirname(__FILE__)."/..")."/common/script";
6. $d = dir( $source_dir );
7. //echo "Handle: " . $d->handle . "/n";
8. //echo "Path: " . $d->path . "/n";
9. while (false !== ($entry = $d->read())) {
10. if($entry=='.') continue;
11. if($entry=='..') continue;
12. if($entry=='.svn') continue;
13. echo $entry."/n";
14. $script = file_get_contents($source_dir. '/'. $entry);
15. $packer = new JavaScriptPacker($script, 'Normal', true, false);
16. $packed = $packer->pack();
17. file_put_contents($out_dir. '/'. $entry, $packed);
18. }
19. $d->close();
20. $t2 = microtime(true);
21. $time = sprintf('%.4f', ($t2 - $t1) );
22. echo 'script in ', $time, ' s.', "/n";
23. die;
24. ?>

3、创建一个自动执行的bat文件。 在文件中输入如下的内容： /usr/local/php/bin/php pack_js_file.php

总结： 只要填好相对路径或者绝对路径，一键加密JS完成，那是相当的方便！！