Best way to read zip file in PHP - php

Question

file_get_contents("zip:///a/b/c.zip") is returning NULL. How can I read unzipped contents of a zip file in PHP 5+?

Answer 1

use ZipArchive class
$zip = new ZipArchive;
$zip->open('test.zip');
echo $zip->getFromName('filename.txt');
$zip->close();

Answer 2

Use zip_open and zip_read functions to do it.
Documentation to it you can find at http://php.net/manual/en/function.zip-read.php
<?php
/**
* This method unzips a directory within a zip-archive
*
* #author Florian 'x!sign.dll' Wolf
* #license LGPL v2 or later
* #link http://www.xsigndll.de
* #link http://www.clansuite.com
*/
function extractZip( $zipFile = '', $dirFromZip = '' )
{
define(DIRECTORY_SEPARATOR, '/');
$zipDir = getcwd() . DIRECTORY_SEPARATOR;
$zip = zip_open($zipDir.$zipFile);
if ($zip)
{
while ($zip_entry = zip_read($zip))
{
$completePath = $zipDir . dirname(zip_entry_name($zip_entry));
$completeName = $zipDir . zip_entry_name($zip_entry);
// Walk through path to create non existing directories
// This won't apply to empty directories ! They are created further below
if(!file_exists($completePath) && preg_match( '#^' . $dirFromZip .'.*#', dirname(zip_entry_name($zip_entry)) ) )
{
$tmp = '';
foreach(explode('/',$completePath) AS $k)
{
$tmp .= $k.'/';
if(!file_exists($tmp) )
{
#mkdir($tmp, 0777);
}
}
}
if (zip_entry_open($zip, $zip_entry, "r"))
{
if( preg_match( '#^' . $dirFromZip .'.*#', dirname(zip_entry_name($zip_entry)) ) )
{
if ($fd = #fopen($completeName, 'w+'))
{
fwrite($fd, zip_entry_read($zip_entry, zip_entry_filesize($zip_entry)));
fclose($fd);
}
else
{
// We think this was an empty directory
mkdir($completeName, 0777);
}
zip_entry_close($zip_entry);
}
}
}
zip_close($zip);
}
return true;
}
// The call to exctract a path within the zip file
extractZip( 'clansuite.zip', 'core/filters' );
?>

Answer 3

look at the build in zip functions:
http://php.net/manual/en/book.zip.php

Answer 4

The zip:// protocol is provided by the ZIP extension of PHP. Check in your phpinfo() output whether the extension has been installed or not.

Answer 5

I am responding to the first part of the question i.e. using the file_get_contents method
'file_get_contents("zip:///a/b/c.zip")' Usually that method is used to read one particular file nested inside the zip file. In order to extract all the contents; others have given nice answers.
I am using PHP 7.2.34 on windows and later on in Linux. I kept a zip file at d:\data and this syntax works in windows. It does echo the contents of example1.py which is inside a "folder" in the ZIP file.
Possibly it is also to do with where/how the zip file was created. When I had created the zip file from within PHP, the internal delimiters were backslashes but when Windows created the zip file (by using the "Send to compressed folder" feature in Windows explorer) then Windows was using the Linux convention inside the zip file!
More testing is needed here to know which delimiter for the internal paths, is being used in the zip file
<?php
$str = file_get_contents('zip://d:/data/demo.zip#examples\\example1.py');
echo $str;
?>