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# CLXXIX. Zip File Functions

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This module enables you to transparently read or write ZIP compressed archives and the files inside them.

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## PHP 4 Bundled

The initial version is bundled in PHP 4 and is available in PECL as version 1.0, see http://pecl.php.net/package/zip. It can only read Zip Archives.

This version uses the functions of the ZZIPlib library by Guido Draheim. You need ZZIPlib version >= 0.10.6.

## PECL and PHP 5.2 or later

The newest version is bundled in PHP 5.2.0 or later and available in PECL, as version 1.1.0 or later. It does not require any external library. It can read and write Zip archives when used with PHP 5.1 or later and can only read them when used with PHP4.

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This PECL extension is not bundled with PHP. Information for installing this PECL extension may be found in the manual chapter titled Installation of PECL extensions. Additional information such as new releases, downloads, source files, maintainer information, and a CHANGELOG, can be located here: http://pecl.php.net/package/zip.

## Installation on Linux

### Installation when bundled with PHP4

In order to use these functions you must compile PHP with zip support by using the --with-zip[=DIR] configure option, where [DIR] is the prefix of the ZZIPlib library install.

### Installation with PECL or bundled with PHP 5.2 or later

In order to use these functions you must compile PHP with zip support by using the --enable-zip configure option. It does not require any external library.

> 注: You can use the PECL version with PHP4. In order to do it you have to disable the bundled Zip extension or recompile PHP without it.

## Installation on Windows

### Installation when bundled with PHP4

Windows users will enable `php_zip.dll` inside of `php.ini` in order to use these functions. In PHP 4 this DLL resides in the `extensions/` directory within the PHP Windows binaries download. You may download this PECL extension DLL from the PHP Downloads page or at http://snaps.php.net/.

> 注: Zip support before PHP 4.1.0 is experimental. This section reflects the Zip extension as it exists in PHP 4.1.0 and later.

### Installation with PECL or bundled with PHP 5.2 or later

Windows users will enable `php_zip.dll` inside of `php.ini` in order to use these functions. In PHP 4 this DLL resides in the `extensions/` directory within the PHP Windows binaries download. You may download this PECL extension DLL from the PHP Downloads page or at http://snaps.php.net/.

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There are two resource types used in the Zip module. The first one is the Zip directory for the Zip archive, the second Zip Entry for the archive entries.

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ZipArchive uses class constants. There is three types of constants, Flags (FL_) errors (ER_) or mode (no prefix).

`ZIPARCHIVE::CREATE` (integer)

  Create the archive if it does not exist.

`ZIPARCHIVE::OVERWRITE` (integer)

  Always start a new archive, this mode will overwrite the file if it already exists.

`ZIPARCHIVE::EXCL` (integer)

  Error if archive already exists.

`ZIPARCHIVE::CHECKCONS` (integer)

  Perform additional consistency checks on the archive, and error if they fail.

`ZIPARCHIVE::FL_NOCASE` (integer)

  Ignore case on name lookup

`ZIPARCHIVE::FL_NODIR` (integer)

  Ignore directory component

`ZIPARCHIVE::FL_COMPRESSED` (integer)

  Read compressed data

`ZIPARCHIVE::FL_UNCHANGED` (integer)

  Use original data, ignoring changes.

`ZIPARCHIVE::CM_DEFAULT` (integer)

  better of deflate or store.

`ZIPARCHIVE::CM_STORE` (integer)

  stored (uncompressed).

`ZIPARCHIVE::CM_SHRINK` (integer)

  shrunk

`ZIPARCHIVE::CM_REDUCE_1` (integer)

  reduced with factor 1

`ZIPARCHIVE::CM_REDUCE_2` (integer)

  reduced with factor 2

`ZIPARCHIVE::CM_REDUCE_3` (integer)

  reduced with factor 3

`ZIPARCHIVE::CM_REDUCE_4` (integer)

  reduced with factor 4

`ZIPARCHIVE::CM_IMPLODE` (integer)

  imploded

`ZIPARCHIVE::CM_DEFLATE` (integer)

  deflated

`ZIPARCHIVE::CM_DEFLATE64` (integer)

  deflate64

`ZIPARCHIVE::CM_PKWARE_IMPLODE` (integer)

  PKWARE imploding

`ZIPARCHIVE::CM_BZIP2` (integer)

  BZIP2 algorithm

`ZIPARCHIVE::ER_OK` (integer)

  No error.

`ZIPARCHIVE::ER_MULTIDISK` (integer)

  Multi-disk zip archives not supported.

`ZIPARCHIVE::ER_RENAME` (integer)

  Renaming temporary file failed.

`ZIPARCHIVE::ER_CLOSE` (integer)

  Closing zip archive failed

`ZIPARCHIVE::ER_SEEK` (integer)

  Seek error

`ZIPARCHIVE::ER_READ` (integer)

  Read error

`ZIPARCHIVE::ER_WRITE` (integer)

  Write error

`ZIPARCHIVE::ER_CRC` (integer)

  CRC error

`ZIPARCHIVE::ER_ZIPCLOSED` (integer)

  Containing zip archive was closed

`ZIPARCHIVE::ER_NOENT` (integer)

  No such file.

`ZIPARCHIVE::ER_EXISTS` (integer)

  File already exists

`ZIPARCHIVE::ER_OPEN` (integer)

  Can't open file

`ZIPARCHIVE::ER_TMPOPEN` (integer)

  Failure to create temporary file.

`ZIPARCHIVE::ER_ZLIB` (integer)

  Zlib error

`ZIPARCHIVE::ER_MEMORY` (integer)

  Memory allocation failure

`ZIPARCHIVE::ER_CHANGED` (string)

  Entry has been changed

`ZIPARCHIVE::ER_COMPNOTSUPP` (integer)

  Compression method not supported.

`ZIPARCHIVE::ER_EOF` (integer)

  Premature EOF

`ZIPARCHIVE::ER_INVAL` (integer)

  Invalid argument

`ZIPARCHIVE::ER_NOZIP` (integer)

  Not a zip archive

`ZIPARCHIVE::ER_INTERNAL` (integer)

  Internal error

`ZIPARCHIVE::ER_INCONS` (integer)

  Zip archive inconsistent

`ZIPARCHIVE::ER_REMOVE` (integer)

  Can't remove file

`ZIPARCHIVE::ER_DELETED` (integer)

  Entry has been deleted

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範例 1. Create a Zip archive

`<?php
$zip = new ZipArchive();
$filename = "./test112.zip";
if ($zip->open($filename, ZIPARCHIVE::CREATE)!==TRUE) {
exit("cannot open <$filename>\n");
}
$zip->addFromString("testfilephp.txt" . time(), "#1 This is a test string added as testfilephp.txt.\n");
$zip->addFromString("testfilephp2.txt" . time(), "#2 This is a test string added as testfilephp2.txt.\n");
$zip->addFile($thisdir . "/too.php","/testfromfile.php");
echo "numfiles: " . $zip->numFiles . "\n";
echo "status:" . $zip->status . "\n";
$zip->close();
?>`

範例 2. Dump the archive details and listing

`<?php
$za = new ZipArchive();
$za->open('test_with_comment.zip');
print_r($za);
var_dump($za);
echo "numFiles: " . $za->numFiles . "\n";
echo "status: " . $za->status . "\n";
echo "statusSys: " . $za->statusSys . "\n";
echo "filename: " . $za->filename . "\n";
echo "comment: " . $za->comment . "\n";
for ($i=0; $i<$za->numFiles;$i++) {
echo "index: $i\n";
print_r($za->statIndex($i));
}
echo "numFile:" . $za->numFiles . "\n";
?>`

範例 3. Zip stream wrapper, read an OpenOffice meta info

`<?php
$reader = new XMLReader();
$reader->open('zip://' . dirname(__FILE__) . '/test.odt#meta.xml');
$odt_meta = array();
while ($reader->read()) {
if ($reader->nodeType == XMLREADER::ELEMENT) {
$elm = $reader->name;
} else {
if ($reader->nodeType == XMLREADER::END_ELEMENT && $reader->name == 'office:meta') {
break;
}
if (!trim($reader->value)) {
continue;
}
$odt_meta[$elm] = $reader->value;
}
}
print_r($odt_meta);
?>`

This example uses the old API (PHP 4), it opens a ZIP file archive, reads each file in the archive and prints out its contents. The `test2.zip` archive used in this example is one of the test archives in the ZZIPlib source distribution.

範例 4. Zip Usage Example

`<?php
$zip = zip_open("/tmp/test2.zip");
if ($zip) {
while ($zip_entry = zip_read($zip)) {
echo "Name: " . zip_entry_name($zip_entry) . "\n";
echo "Actual Filesize: " . zip_entry_filesize($zip_entry) . "\n";
echo "Compressed Size: " . zip_entry_compressedsize($zip_entry) . "\n";
echo "Compression Method: " . zip_entry_compressionmethod($zip_entry) . "\n";
if (zip_entry_open($zip, $zip_entry, "r")) {
echo "File Contents:\n";
$buf = zip_entry_read($zip_entry, zip_entry_filesize($zip_entry));
echo "$buf\n";
zip_entry_close($zip_entry);
}
echo "\n";
}
zip_close($zip);
}
?>`

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