In my previous post i had posted how you can make a zip file in Php. But i know many of you are also looking to unzip a zip file in php. So here i am back with the solution.
The class i am going to provide you has been taken from the Phpmyadmin code. By using this class you can easily extract a zip file and can save all the files and folders in any zip file and yes you can do this all in Php :)
if you are looking for how to zip files then click here

Here is the code for the unzip class

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
   class SimpleUnzip {
// 2003-12-02 - HB >
        /**
         *  Array to store file entries
         *
         *  @var    string
         *  @access public
         *  @see    ReadFile()
         *  @since  1.0.1
         */
        var $Comment = '';
// 2003-12-02 - HB <
 
        /**
         *  Array to store file entries
         *
         *  @var    array
         *  @access public
         *  @see    ReadFile()
         *  @since  1.0
         */
        var $Entries = array();
 
        /**
         *  Name of the ZIP file
         *
         *  @var    string
         *  @access public
         *  @see    ReadFile()
         *  @since  1.0
         */
        var $Name = '';
 
        /**
         *  Size of the ZIP file
         *
         *  @var    integer
         *  @access public
         *  @see    ReadFile()
         *  @since  1.0
         */
        var $Size = 0;
 
        /**
         *  Time of the ZIP file (unix timestamp)
         *
         *  @var    integer
         *  @access public
         *  @see    ReadFile()
         *  @since  1.0
         */
        var $Time = 0;
 
        /**
         *  Contructor of the class
         *
         *  @param  string      File name
         *  @return SimpleUnzip Instanced class
         *  @access public
         *  @uses   SimpleUnzip::ReadFile() Opens file on new if specified
         *  @since  1.0
         */
        function SimpleUnzip($in_FileName = '')
        {
            if ($in_FileName !== '') {
                SimpleUnzip::ReadFile($in_FileName);
            }
        } // end of the 'SimpleUnzip' constructor
 
        /**
         *  Counts the entries
         *
         *  @return integer Count of ZIP entries
         *  @access public
         *  @uses   $Entries
         *  @since  1.0
         */
        function Count()
        {
            return count($this->Entries);
        } // end of the 'Count()' method
 
        /**
         *  Gets data of the specified ZIP entry
         *
         *  @param  integer Index of the ZIP entry
         *  @return mixed   Data for the ZIP entry
         *  @uses   SimpleUnzipEntry::$Data
         *  @access public
         *  @since  1.0
         */
        function GetData($in_Index)
        {
            return $this->Entries[$in_Index]->Data;
        } // end of the 'GetData()' method
 
        /**
         *  Gets an entry of the ZIP file
         *
         *  @param  integer             Index of the ZIP entry
         *  @return SimpleUnzipEntry    Entry of the ZIP file
         *  @uses   $Entries
         *  @access public
         *  @since  1.0
         */
        function GetEntry($in_Index)
        {
            return $this->Entries[$in_Index];
        } // end of the 'GetEntry()' method
 
        /**
         *  Gets error code for the specified ZIP entry
         *
         *  @param  integer     Index of the ZIP entry
         *  @return integer     Error code for the ZIP entry
         *  @uses   SimpleUnzipEntry::$Error
         *  @access public
         *  @since   1.0
         */
        function GetError($in_Index)
        {
            return $this->Entries[$in_Index]->Error;
        } // end of the 'GetError()' method
 
        /**
         *  Gets error message for the specified ZIP entry
         *
         *  @param  integer     Index of the ZIP entry
         *  @return string      Error message for the ZIP entry
         *  @uses   SimpleUnzipEntry::$ErrorMsg
         *  @access public
         *  @since  1.0
         */
        function GetErrorMsg($in_Index)
        {
            return $this->Entries[$in_Index]->ErrorMsg;
        } // end of the 'GetErrorMsg()' method
 
        /**
         *  Gets file name for the specified ZIP entry
         *
         *  @param  integer     Index of the ZIP entry
         *  @return string      File name for the ZIP entry
         *  @uses   SimpleUnzipEntry::$Name
         *  @access public
         *  @since  1.0
         */
        function GetName($in_Index)
        {
            return $this->Entries[$in_Index]->Name;
        } // end of the 'GetName()' method
 
        /**
         *  Gets path of the file for the specified ZIP entry
         *
         *  @param  integer     Index of the ZIP entry
         *  @return string      Path of the file for the ZIP entry
         *  @uses   SimpleUnzipEntry::$Path
         *  @access public
         *  @since  1.0
         */
        function GetPath($in_Index)
        {
            return $this->Entries[$in_Index]->Path;
        } // end of the 'GetPath()' method
 
        /**
         *  Gets file time for the specified ZIP entry
         *
         *  @param  integer     Index of the ZIP entry
         *  @return integer     File time for the ZIP entry (unix timestamp)
         *  @uses   SimpleUnzipEntry::$Time
         *  @access public
         *  @since  1.0
         */
        function GetTime($in_Index)
        {
            return $this->Entries[$in_Index]->Time;
        } // end of the 'GetTime()' method
 
        /**
         *  Reads ZIP file and extracts the entries
         *
         *  @param  string              File name of the ZIP archive
         *  @return array               ZIP entry list (see also class variable {@link $Entries $Entries})
         *  @uses   SimpleUnzipEntry    For the entries
         *  @access public
         *  @since  1.0
         */
        function ReadFile($in_FileName)
        {
            $this->Entries = array();
 
            // Get file parameters
            $this->Name = $in_FileName;
            $this->Time = filemtime($in_FileName);
            $this->Size = filesize($in_FileName);
 
            // Read file
            $oF = fopen($in_FileName, 'rb');
            $vZ = fread($oF, $this->Size);
            fclose($oF);
 
// 2003-12-02 - HB >
            // Cut end of central directory
            $aE = explode("\x50\x4b\x05\x06", $vZ);
 
            // Easiest way, but not sure if format changes
            //$this->Comment = substr($aE[1], 18);
 
            // Normal way
            $aP = unpack('x16/v1CL', $aE[1]);
            $this->Comment = substr($aE[1], 18, $aP['CL']);
 
            // Translates end of line from other operating systems
            $this->Comment = strtr($this->Comment, array("\r\n" => "\n",
                                                         "\r"   => "\n"));
// 2003-12-02 - HB <
 
            // Cut the entries from the central directory
            $aE = explode("\x50\x4b\x01\x02", $vZ);
            // Explode to each part
            $aE = explode("\x50\x4b\x03\x04", $aE[0]);
            // Shift out spanning signature or empty entry
            array_shift($aE);
 
            // Loop through the entries
            foreach ($aE as $vZ) {
                $aI = array();
                $aI['E']  = 0;
                $aI['EM'] = '';
                // Retrieving local file header information
                $aP = unpack('v1VN/v1GPF/v1CM/v1FT/v1FD/V1CRC/V1CS/V1UCS/v1FNL', $vZ);
                // Check if data is encrypted
                $bE = ($aP['GPF'] & 0x0001) ? TRUE : FALSE;
                $nF = $aP['FNL'];
 
                // Special case : value block after the compressed data
                if ($aP['GPF'] & 0x0008) {
                    $aP1 = unpack('V1CRC/V1CS/V1UCS', substr($vZ, -12));
 
                    $aP['CRC'] = $aP1['CRC'];
                    $aP['CS']  = $aP1['CS'];
                    $aP['UCS'] = $aP1['UCS'];
 
                    $vZ = substr($vZ, 0, -12);
                }
 
                // Getting stored filename
                $aI['N'] = substr($vZ, 26, $nF);
 
                if (substr($aI['N'], -1) == '/') {
                    // is a directory entry - will be skipped
                    continue;
                }
 
                // Truncate full filename in path and filename
                $aI['P'] = dirname($aI['N']);
                $aI['P'] = $aI['P'] == '.' ? '' : $aI['P'];
                $aI['N'] = basename($aI['N']);
 
                $vZ = substr($vZ, 26 + $nF);
 
                if (strlen($vZ) != $aP['CS']) {
                  $aI['E']  = 1;
                  $aI['EM'] = 'Compressed size is not equal with the value in header information.';
                } else {
                    if ($bE) {
                        $aI['E']  = 5;
                        $aI['EM'] = 'File is encrypted, which is not supported from this class.';
                    } else {
                        switch($aP['CM']) {
                            case 0: // Stored
                                // Here is nothing to do, the file ist flat.
                                break;
 
                            case 8: // Deflated
                                $vZ = gzinflate($vZ);
                                break;
 
                            case 12: // BZIP2
// 2003-12-02 - HB >
                                if (! extension_loaded('bz2')) {
                                    if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN') {
                                      @dl('php_bz2.dll');
                                    } else {
                                      @dl('bz2.so');
                                    }
                                }
 
                                if (extension_loaded('bz2')) {
// 2003-12-02 - HB <
                                    $vZ = bzdecompress($vZ);
// 2003-12-02 - HB >
                                } else {
                                    $aI['E']  = 7;
                                    $aI['EM'] = "PHP BZIP2 extension not available.";
                                }
// 2003-12-02 - HB <
 
                                break;
 
                            default:
                              $aI['E']  = 6;
                              $aI['EM'] = "De-/Compression method {$aP['CM']} is not supported.";
                        }
 
// 2003-12-02 - HB >
                        if (! $aI['E']) {
// 2003-12-02 - HB <
                            if ($vZ === FALSE) {
                                $aI['E']  = 2;
                                $aI['EM'] = 'Decompression of data failed.';
                            } else {
                                if (strlen($vZ) != $aP['UCS']) {
                                    $aI['E']  = 3;
                                    $aI['EM'] = 'Uncompressed size is not equal with the value in header information.';
                                } else {
                                    if (crc32($vZ) != $aP['CRC']) {
                                        $aI['E']  = 4;
                                        $aI['EM'] = 'CRC32 checksum is not equal with the value in header information.';
                                    }
                                }
                            }
// 2003-12-02 - HB >
                        }
// 2003-12-02 - HB <
                    }
                }
 
                $aI['D'] = $vZ;
 
                // DOS to UNIX timestamp
                $aI['T'] = mktime(($aP['FT']  & 0xf800) >> 11,
                                  ($aP['FT']  & 0x07e0) >>  5,
                                  ($aP['FT']  & 0x001f) <<  1,
                                  ($aP['FD']  & 0x01e0) >>  5,
                                  ($aP['FD']  & 0x001f),
                                  (($aP['FD'] & 0xfe00) >>  9) + 1980);
 
                $this->Entries[] = &new SimpleUnzipEntry($aI);
            } // end for each entries
 
            return $this->Entries;
        } // end of the 'ReadFile()' method
    } // end of the 'SimpleUnzip' class
 
    /**
     *  Entry of the ZIP file.
     *
     *  @category   phpPublic
     *  @package    File-Formats-ZIP
     *  @subpackage Unzip
     *  @version    1.0
     *  @author     Holger Boskugel <vbwebprofi@gmx.de>
     *  @example    example.unzip.php Two examples
     */
    class SimpleUnzipEntry {
        /**
         *  Data of the file entry
         *
         *  @var    mixed
         *  @access public
         *  @see    SimpleUnzipEntry()
         *  @since  1.0
         */
        var $Data = '';
 
        /**
         *  Error of the file entry
         *
         *  - 0 : No error raised.<BR>
         *  - 1 : Compressed size is not equal with the value in header information.<BR>
         *  - 2 : Decompression of data failed.<BR>
         *  - 3 : Uncompressed size is not equal with the value in header information.<BR>
         *  - 4 : CRC32 checksum is not equal with the value in header information.<BR>
         *  - 5 : File is encrypted, which is not supported from this class.<BR>
         *  - 6 : De-/Compression method ... is not supported.<BR>
         *  - 7 : PHP BZIP2 extension not available.
         *
         *  @var    integer
         *  @access public
         *  @see    SimpleUnzipEntry()
         *  @since  1.0
         */
        var $Error = 0;
 
        /**
         *  Error message of the file entry
         *
         *  @var    string
         *  @access public
         *  @see    SimpleUnzipEntry()
         *  @since  1.0
         */
        var $ErrorMsg = '';
 
        /**
         *  File name of the file entry
         *
         *  @var    string
         *  @access public
         *  @see    SimpleUnzipEntry()
         *  @since  1.0
         */
        var $Name = '';
 
        /**
         *  File path of the file entry
         *
         *  @var    string
         *  @access public
         *  @see    SimpleUnzipEntry()
         *  @since  1.0
         */
        var $Path = '';
 
        /**
         *  File time of the file entry (unix timestamp)
         *
         *  @var    integer
         *  @access public
         *  @see    SimpleUnzipEntry()
         *  @since  1.0
         */
        var $Time = 0;
 
        /**
         *  Contructor of the class
         *
         *  @param  array               Entry datas
         *  @return SimpleUnzipEntry    Instanced class
         *  @access public
         *  @since  1.0
         */
        function SimpleUnzipEntry($in_Entry)
        {
            $this->Data     = $in_Entry['D'];
            $this->Error    = $in_Entry['E'];
            $this->ErrorMsg = $in_Entry['EM'];
            $this->Name     = $in_Entry['N'];
            $this->Path     = $in_Entry['P'];
            $this->Time     = $in_Entry['T'];
        } // end of the 'SimpleUnzipEntry' constructor
    } // end of the 'SimpleUnzipEntry' class

Here is the code through which you can use this class in your Php file.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
$obj = new SimpleUnzipEntry();
$obj->ReadFile($path_of_the_zip_file_on_server);
 
if ($obj->Count() == 0) { //check if zip is empty
	echo "The Zip file is empty";
} 
else {
	for($i=0;$i<$obj->Count();$i++)
	{ 
		$data=$obj->GetData($i); // gives you the data of the current file in zip
		$name=$obj->GetName($i); // gives you the name of the current file in zip
		file_put_contents($name,$data); //saving the file on server
	}
}

if you are looking for how to zip files then click here