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// --------------------------------------------------------------------------------
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// PclZip 2.8.2 - readme.txt
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// --------------------------------------------------------------------------------
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// License GNU/LGPL - August 2009
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// Vincent Blavet - vincent@phpconcept.net
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// http://www.phpconcept.net
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// --------------------------------------------------------------------------------
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// $Id: readme.txt,v 1.60 2009/09/30 20:35:21 vblavet Exp $
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// --------------------------------------------------------------------------------
10
 
11
 
12
 
13
 
14
============
15
    1 - Introduction
16
    2 - What's new
17
    3 - Corrected bugs
18
    4 - Known bugs or limitations
19
    5 - License
20
    6 - Warning
21
    7 - Documentation
22
    8 - Author
23
    9 - Contribute
24
 
25
1 - Introduction
26
================
27
 
28
  PclZip is a library that allow you to manage a Zip archive.
29
 
30
  Full documentation about PclZip can be found here : http://www.phpconcept.net/pclzip
31
 
32
2 - What's new
33
==============
34
 
35
  Version 2.8.2 :
36
    - PCLZIP_CB_PRE_EXTRACT and PCLZIP_CB_POST_EXTRACT are now supported with
37
      extraction as a string (PCLZIP_OPT_EXTRACT_AS_STRING). The string
38
      can also be modified in the post-extract call back.
39
    **Bugs correction :
40
    - PCLZIP_OPT_REMOVE_ALL_PATH was not working correctly
41
    - Remove use of eval() and do direct call to callback functions
42
    - Correct support of 64bits systems (Thanks to WordPress team)
43
 
44
  Version 2.8.1 :
45
    - Move option PCLZIP_OPT_BY_EREG to PCLZIP_OPT_BY_PREG because ereg() is
46
      deprecated in PHP 5.3. When using option PCLZIP_OPT_BY_EREG, PclZip will
47
      automatically replace it by PCLZIP_OPT_BY_PREG.
48
 
49
  Version 2.8 :
50
    - Improve extraction of zip archive for large files by using temporary files
51
      This feature is working like the one defined in r2.7.
52
      Options are renamed : PCLZIP_OPT_TEMP_FILE_ON, PCLZIP_OPT_TEMP_FILE_OFF,
53
      PCLZIP_OPT_TEMP_FILE_THRESHOLD
54
    - Add a ratio constant PCLZIP_TEMPORARY_FILE_RATIO to configure the auto
55
      sense of temporary file use.
56
    - Bug correction : Reduce filepath in returned file list to remove ennoying
57
      './/' preambule in file path.
58
 
59
  Version 2.7 :
60
    - Improve creation of zip archive for large files :
61
      PclZip will now autosense the configured memory and use temporary files
62
      when large file is suspected.
63
      This feature can also ne triggered by manual options in create() and add()
64
      methods. 'PCLZIP_OPT_ADD_TEMP_FILE_ON' force the use of temporary files,
65
      'PCLZIP_OPT_ADD_TEMP_FILE_OFF' disable the autosense technic,
66
      'PCLZIP_OPT_ADD_TEMP_FILE_THRESHOLD' allow for configuration of a size
67
      threshold to use temporary files.
68
      Using "temporary files" rather than "memory" might take more time, but
69
      might give the ability to zip very large files :
70
      Tested on my win laptop with a 88Mo file :
71
        Zip "in-memory" : 18sec (max_execution_time=30, memory_limit=180Mo)
72
        Zip "tmporary-files" : 23sec (max_execution_time=30, memory_limit=30Mo)
73
    - Replace use of mktime() by time() to limit the E_STRICT error messages.
74
    - Bug correction : When adding files with full windows path (drive letter)
75
      PclZip is now working. Before, if the drive letter is not the default
76
      path, PclZip was not able to add the file.
77
 
78
  Version 2.6 :
79
    - Code optimisation
80
    - New attributes PCLZIP_ATT_FILE_COMMENT gives the ability to
81
      add a comment for a specific file. (Don't really know if this is usefull)
82
    - New attribute PCLZIP_ATT_FILE_CONTENT gives the ability to add a string
83
      as a file.
84
    - New attribute PCLZIP_ATT_FILE_MTIME modify the timestamp associated with
85
      a file.
86
    - Correct a bug. Files archived with a timestamp with 0h0m0s were extracted
87
      with current time
88
    - Add CRC value in the informations returned back for each file after an
89
      action.
90
    - Add missing closedir() statement.
91
    - When adding a folder, and removing the path of this folder, files were
92
      incorrectly added with a '/' at the beginning. Which means files are
93
      related to root in unix systems. Corrected.
94
    - Add conditional if before constant definition. This will allow users
95
      to redefine constants without changing the file, and then improve
96
      upgrade of pclzip code for new versions.
97
 
98
  Version 2.5 :
99
    - Introduce the ability to add file/folder with individual properties (file descriptor).
100
      This gives for example the ability to change the filename of a zipped file.
101
      . Able to add files individually
102
      . Able to change full name
103
      . Able to change short name
104
      . Compatible with global options
105
    - New attributes : PCLZIP_ATT_FILE_NAME, PCLZIP_ATT_FILE_NEW_SHORT_NAME, PCLZIP_ATT_FILE_NEW_FULL_NAME
106
    - New error code : PCLZIP_ERR_INVALID_ATTRIBUTE_VALUE
107
    - Add a security control feature. PclZip can extract any file in any folder
108
      of a system. People may use this to upload a zip file and try to override
109
      a system file. The PCLZIP_OPT_EXTRACT_DIR_RESTRICTION will give the
110
      ability to forgive any directory transversal behavior.
111
    - New PCLZIP_OPT_EXTRACT_DIR_RESTRICTION : check extraction path
112
    - New error code : PCLZIP_ERR_DIRECTORY_RESTRICTION
113
    - Modification in PclZipUtilPathInclusion() : dir and path beginning with ./ will be prepend
114
      by current path (getcwd())
115
 
116
  Version 2.4 :
117
    - Code improvment : try to speed up the code by removing unusefull call to pack()
118
    - Correct bug in delete() : delete() should be called with no argument. This was not
119
      the case in 2.3. This is corrected in 2.4.
120
    - Correct a bug in path_inclusion function. When the path has several '../../', the
121
      result was bad.
122
    - Add a check for magic_quotes_runtime configuration. If enabled, PclZip will
123
      disable it while working and det it back to its original value.
124
      This resolve a lots of bad formated archive errors.
125
    - Bug correction : PclZip now correctly unzip file in some specific situation,
126
      when compressed content has same size as uncompressed content.
127
    - Bug correction : When selecting option 'PCLZIP_OPT_REMOVE_ALL_PATH',
128
      directories are not any more created.
129
    - Code improvment : correct unclosed opendir(), better handling of . and .. in
130
      loops.
131
 
132
 
133
  Version 2.3 :
134
    - Correct a bug with PHP5 : affecting the value 0xFE49FFE0 to a variable does not
135
      give the same result in PHP4 and PHP5 ....
136
 
137
  Version 2.2 :
138
    - Try development of PCLZIP_OPT_CRYPT .....
139
      However this becomes to a stop. To crypt/decrypt I need to multiply 2 long integers,
140
      the result (greater than a long) is not supported by PHP. Even the use of bcmath
141
      functions does not help. I did not find yet a solution ...;
142
    - Add missing '/' at end of directory entries
143
    - Check is a file is encrypted or not. Returns status 'unsupported_encryption' and/or
144
      error code PCLZIP_ERR_UNSUPPORTED_ENCRYPTION.
145
    - Corrected : Bad "version need to extract" field in local file header
146
    - Add private method privCheckFileHeaders() in order to check local and central
147
      file headers. PclZip is now supporting purpose bit flag bit 3. Purpose bit flag bit 3 gives
148
      the ability to have a local file header without size, compressed size and crc filled.
149
    - Add a generic status 'error' for file status
150
    - Add control of compression type. PclZip only support deflate compression method.
151
      Before v2.2, PclZip does not check the compression method used in an archive while
152
      extracting. With v2.2 PclZip returns a new error status for a file using an unsupported
153
      compression method. New status is "unsupported_compression". New error code is
154
      PCLZIP_ERR_UNSUPPORTED_COMPRESSION.
155
    - Add optional attribute PCLZIP_OPT_STOP_ON_ERROR. This will stop the extract of files
156
      when errors like 'a folder with same name exists' or 'a newer file exists' or
157
      'a write protected file' exists, rather than set a status for the concerning file
158
      and resume the extract of the zip.
159
    - Add optional attribute PCLZIP_OPT_REPLACE_NEWER. This will force, during an extract' the
160
      replacement of the file, even if a  newer version of the file exists.
161
      Note that today if a file with the same name already exists but is older it will be
162
      replaced by the extracted one.
163
    - Improve PclZipUtilOption()
164
    - Support of zip archive with trailing bytes. Before 2.2, PclZip checks that the central
165
      directory structure is the last data in the archive. Crypt encryption/decryption of
166
      zip archive put trailing 0 bytes after decryption. PclZip is now supporting this.
167
 
168
  Version 2.1 :
169
    - Add the ability to abort the extraction by using a user callback function.
170
      The user can now return the value '2' in its callback which indicates to stop the
171
      extraction. For a pre call-back extract is stopped before the extration of the current
172
      file. For a post call back, the extraction is stopped after.
173
    - Add the ability to extract a file (or several files) directly in the standard output.
174
      This is done by the new parameter PCLZIP_OPT_EXTRACT_IN_OUTPUT with method extract().
175
    - Add support for parameters PCLZIP_OPT_COMMENT, PCLZIP_OPT_ADD_COMMENT,
176
      PCLZIP_OPT_PREPEND_COMMENT. This will create, replace, add, or prepend comments
177
      in the zip archive.
178
    - When merging two archives, the comments are not any more lost, but merged, with a
179
      blank space separator.
180
    - Corrected bug : Files are not deleted when all files are asked to be deleted.
181
    - Corrected bug : Folders with name '0' made PclZip to abort the create or add feature.
182
 
183
 
184
  Version 2.0 :
185
    ***** Warning : Some new features may break the backward compatibility for your scripts.
186
                    Please carefully read the readme file.
187
    - Add the ability to delete by Index, name and regular expression. This feature is
188
      performed by the method delete(), which uses the optional parameters
189
      PCLZIP_OPT_BY_INDEX, PCLZIP_OPT_BY_NAME, PCLZIP_OPT_BY_EREG or PCLZIP_OPT_BY_PREG.
190
    - Add the ability to extract by regular expression. To extract by regexp you must use the method
191
      extract(), with the option PCLZIP_OPT_BY_EREG or PCLZIP_OPT_BY_PREG
192
      (depending if you want to use ereg() or preg_match() syntax) followed by the
193
      regular expression pattern.
194
    - Add the ability to extract by index, directly with the extract() method. This is a
195
      code improvment of the extractByIndex() method.
196
    - Add the ability to extract by name. To extract by name you must use the method
197
      extract(), with the option PCLZIP_OPT_BY_NAME followed by the filename to
198
      extract or an array of filenames to extract. To extract all a folder, use the folder
199
      name rather than the filename with a '/' at the end.
200
    - Add the ability to add files without compression. This is done with a new attribute
201
      which is PCLZIP_OPT_NO_COMPRESSION.
202
    - Add the attribute PCLZIP_OPT_EXTRACT_AS_STRING, which allow to extract a file directly
203
      in a string without using any file (or temporary file).
204
    - Add constant PCLZIP_SEPARATOR for static configuration of filename separators in a single string.
205
      The default separator is now a comma (,) and not any more a blank space.
206
      THIS BREAK THE BACKWARD COMPATIBILITY : Please check if this may have an impact with
207
      your script.
208
    - Improve algorythm performance by removing the use of temporary files when adding or
209
      extracting files in an archive.
210
    - Add (correct) detection of empty filename zipping. This can occurs when the removed
211
      path is the same
212
      as a zipped dir. The dir is not zipped (['status'] = filtered), only its content.
213
    - Add better support for windows paths (thanks for help from manus@manusfreedom.com).
214
    - Corrected bug : When the archive file already exists with size=0, the add() method
215
      fails. Corrected in 2.0.
216
    - Remove the use of OS_WINDOWS constant. Use php_uname() function rather.
217
    - Control the order of index ranges in extract by index feature.
218
    - Change the internal management of folders (better handling of internal flag).
219
 
220
 
221
  Version 1.3 :
222
    - Removing the double include check. This is now done by include_once() and require_once()
223
      PHP directives.
224
    - Changing the error handling mecanism : Remove the use of an external error library.
225
      The former PclError...() functions are replaced by internal equivalent methods.
226
      By changing the environment variable PCLZIP_ERROR_EXTERNAL you can still use the former library.
227
      Introducing the use of constants for error codes rather than integer values. This will help
228
      in futur improvment.
229
      Introduction of error handling functions like errorCode(), errorName() and errorInfo().
230
    - Remove the deprecated use of calling function with arguments passed by reference.
231
    - Add the calling of extract(), extractByIndex(), create() and add() functions
232
      with variable options rather than fixed arguments.
233
    - Add the ability to remove all the file path while extracting or adding,
234
      without any need to specify the path to remove.
235
      This is available for extract(), extractByIndex(), create() and add() functionS by using
236
      the new variable options parameters :
237
      - PCLZIP_OPT_REMOVE_ALL_PATH : by indicating this option while calling the fct.
238
    - Ability to change the mode of a file after the extraction (chmod()).
239
      This is available for extract() and extractByIndex() functionS by using
240
      the new variable options parameters.
241
      - PCLZIP_OPT_SET_CHMOD : by setting the value of this option.
242
    - Ability to definition call-back options. These call-back will be called during the adding,
243
      or the extracting of file (extract(), extractByIndex(), create() and add() functions) :
244
      - PCLZIP_CB_PRE_EXTRACT : will be called before each extraction of a file. The user
245
        can trigerred the change the filename of the extracted file. The user can triggered the
246
        skip of the extraction. This is adding a 'skipped' status in the file list result value.
247
      - PCLZIP_CB_POST_EXTRACT : will be called after each extraction of a file.
248
        Nothing can be triggered from that point.
249
      - PCLZIP_CB_PRE_ADD : will be called before each add of a file. The user
250
        can trigerred the change the stored filename of the added file. The user can triggered the
251
        skip of the add. This is adding a 'skipped' status in the file list result value.
252
      - PCLZIP_CB_POST_ADD : will be called after each add of a file.
253
        Nothing can be triggered from that point.
254
    - Two status are added in the file list returned as function result : skipped & filename_too_long
255
      'skipped' is used when a call-back function ask for skipping the file.
256
      'filename_too_long' is used while adding a file with a too long filename to archive (the file is
257
      not added)
258
    - Adding the function PclZipUtilPathInclusion(), that check the inclusion of a path into
259
      a directory.
260
    - Add a check of the presence of the archive file before some actions (like list, ...)
261
    - Add the initialisation of field "index" in header array. This means that by
262
      default index will be -1 when not explicitly set by the methods.
263
 
264
  Version 1.2 :
265
    - Adding a duplicate function.
266
    - Adding a merge function. The merge function is a "quick merge" function,
267
      it just append the content of an archive at the end of the first one. There
268
      is no check for duplicate files or more recent files.
269
    - Improve the search of the central directory end.
270
 
271
  Version 1.1.2 :
272
 
273
    - Changing the license of PclZip. PclZip is now released under the GNU / LGPL license
274
      (see License section).
275
    - Adding the optional support of a static temporary directory. You will need to configure
276
      the constant PCLZIP_TEMPORARY_DIR if you want to use this feature.
277
    - Improving the rename() function. In some cases rename() does not work (different
278
      Filesystems), so it will be replaced by a copy() + unlink() functions.
279
 
280
  Version 1.1.1 :
281
 
282
    - Maintenance release, no new feature.
283
 
284
  Version 1.1 :
285
 
286
    - New method Add() : adding files in the archive
287
    - New method ExtractByIndex() : partial extract of the archive, files are identified by
288
      their index in the archive
289
    - New method DeleteByIndex() : delete some files/folder entries from the archive,
290
      files are identified by their index in the archive.
291
    - Adding a test of the zlib extension presence. If not present abort the script.
292
 
293
  Version 1.0.1 :
294
 
295
    - No new feature
296
 
297
 
298
3 - Corrected bugs
299
==================
300
 
301
  Corrected in Version 2.0 :
302
    - Corrected : During an extraction, if a call-back fucntion is used and try to skip
303
                  a file, all the extraction process is stopped.
304
 
305
  Corrected in Version 1.3 :
306
    - Corrected : Support of static synopsis for method extract() is broken.
307
    - Corrected : invalid size of archive content field (0xFF) should be (0xFFFF).
308
    - Corrected : When an extract is done with a remove_path parameter, the entry for
309
      the directory with exactly the same path is not skipped/filtered.
310
    - Corrected : extractByIndex() and deleteByIndex() were not managing index in the
311
      right way. For example indexes '1,3-5,11' will only extract files 1 and 11. This
312
      is due to a sort of the index resulting table that puts 11 before 3-5 (sort on
313
      string and not interger). The sort is temporarilly removed, this means that
314
      you must provide a sorted list of index ranges.
315
 
316
  Corrected in Version 1.2 :
317
 
318
    - Nothing.
319
 
320
  Corrected in Version 1.1.2 :
321
 
322
    - Corrected : Winzip is unable to delete or add new files in a PclZip created archives.
323
 
324
  Corrected in Version 1.1.1 :
325
 
326
    - Corrected : When archived file is not compressed (0% compression), the
327
      extract method fails.
328
 
329
  Corrected in Version 1.1 :
330
 
331
    - Corrected : Adding a complete tree of folder may result in a bad archive
332
      creation.
333
 
334
  Corrected in Version 1.0.1 :
335
 
336
    - Corrected : Error while compressing files greater than PCLZIP_READ_BLOCK_SIZE (default=1024).
337
 
338
 
339
4 - Known bugs or limitations
340
=============================
341
 
342
  Please publish bugs reports in SourceForge :
343
    http://sourceforge.net/tracker/?group_id=40254&atid=427564
344
 
345
  In Version 2.x :
346
    - PclZip does only support file uncompressed or compressed with deflate (compression method 8)
347
    - PclZip does not support password protected zip archive
348
    - Some concern were seen when changing mtime of a file while archiving.
349
      Seems to be linked to Daylight Saving Time (PclTest_changing_mtime).
350
 
351
  In Version 1.2 :
352
 
353
    - merge() methods does not check for duplicate files or last date of modifications.
354
 
355
  In Version 1.1 :
356
 
357
    - Limitation : Using 'extract' fields in the file header in the zip archive is not supported.
358
    - WinZip is unable to delete a single file in a PclZip created archive. It is also unable to
359
      add a file in a PclZip created archive. (Corrected in v.1.2)
360
 
361
  In Version 1.0.1 :
362
 
363
    - Adding a complete tree of folder may result in a bad archive
364
      creation. (Corrected in V.1.1).
365
    - Path given to methods must be in the unix format (/) and not the Windows format (\).
366
      Workaround : Use only / directory separators.
367
    - PclZip is using temporary files that are sometime the name of the file with a .tmp or .gz
368
      added suffix. Files with these names may already exist and may be overwritten.
369
      Workaround : none.
370
    - PclZip does not check if the zlib extension is present. If it is absent, the zip
371
      file is not created and the lib abort without warning.
372
      Workaround : enable the zlib extension on the php install
373
 
374
  In Version 1.0 :
375
 
376
    - Error while compressing files greater than PCLZIP_READ_BLOCK_SIZE (default=1024).
377
      (Corrected in v.1.0.1)
378
    - Limitation : Multi-disk zip archive are not supported.
379
 
380
 
381
5 - License
382
===========
383
 
384
  Since version 1.1.2, PclZip Library is released under GNU/LGPL license.
385
  This library is free, so you can use it at no cost.
386
 
387
  HOWEVER, if you release a script, an application, a library or any kind of
388
  code using PclZip library (or a part of it), YOU MUST :
389
  - Indicate in the documentation (or a readme file), that your work
390
    uses PclZip Library, and make a reference to the author and the web site
391
    http://www.phpconcept.net
392
  - Gives the ability to the final user to update the PclZip libary.
393
 
394
  I will also appreciate that you send me a mail (vincent@phpconcept.net), just to
395
  be aware that someone is using PclZip.
396
 
397
  For more information about GNU/LGPL license : http://www.gnu.org
398
 
399
6 - Warning
400
=================
401
 
402
  This library and the associated files are non commercial, non professional work.
403
  It should not have unexpected results. However if any damage is caused by this software
404
  the author can not be responsible.
405
  The use of this software is at the risk of the user.
406
 
407
7 - Documentation
408
=================
409
  PclZip User Manuel is available in English on PhpConcept : http://www.phpconcept.net/pclzip/man/en/index.php
410
  A Russian translation was done by Feskov Kuzma : http://php.russofile.ru/ru/authors/unsort/zip/
411
 
412
8 - Author
413
==========
414
 
415
  This software was written by Vincent Blavet (vincent@phpconcept.net) on its leasure time.
416
 
417
9 - Contribute
418
==============
419
  If you want to contribute to the development of PclZip, please contact vincent@phpconcept.net.
420
  If you can help in financing PhpConcept hosting service, please go to
421
  http://www.phpconcept.net/soutien.php