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# CLXXXVII. Zip File Functions

# Introduction

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

# Requirements

## PHP 4

The bundled PHP 4 version requires ZZIPlib, by Guido Draheim, version 0.10.6 or later

## PHP 5.2.0 or later

This extension uses the functions of zlib by Jean-loup Gailly and Mark Adler.

# Installation

## PHP 4

> Note: Zip support before PHP 4.1.0 is experimental.

Warning
Because the PHP 4 zip extension is unmaintained we recommend that the PECL extension is used rather than the bundled one.

### Linux systems

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.

### Windows

Windows users need to enable `php_zip.dll` inside of `php.ini` in order to use these functions.

## PHP 5.2.0 and later

### Linux systems

In order to use these functions you must compile PHP with zip support by using the `--enable-zip` configure option.

### Windows

Windows users need to enable `php_zip.dll` inside of `php.ini` in order to use these functions.

## Installation via PECL

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.

The DLL for this PECL extension may be downloaded from either the PHP Downloads page or from http://pecl4win.php.net/

In PHP 4 this DLL resides in the `extensions/` directory within the PHP Windows binaries download.

# Runtime Configuration

This extension has no configuration directives defined in `php.ini`.

# Resource Types

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.

# Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

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

# Examples

Example 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();
?>`

Example 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";
?>`

Example 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.

Example 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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