PHP

Open a Zip Archive

See more Zip Examples

Demonstrates how to open a zip, or an encrypted .zip, or a legacy password-protected .zip. Chilkat2 PHP

<?php

use Chilkat2\Zip;

$zip = new Zip();

// Open a non-encrypted .zip
try {
    $zip->OpenZip('qa_data/zips/sample.zip');
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo 'Num entries = ', $zip->NumEntries, "\n";

// ...
// ...

$zip->CloseZip();

// ----------------------------------------------------------------------------
// Open an encrypted zip...

// The two main types of encryption used in ZIP archives are Password-Protected and AES.
//

// ---------------------------------------
// 1. Legacy Password-Protected Zip
//
// This is the older and less secure method of encrypting ZIP archives.
// It provides a basic level of security, but is considered weak by modern standards.
// It is vulnerable to various attacks, including known-plaintext attacks and brute force attacks.
// Although Chilkat allows it, you shouldn't create new zip archives using legacy password-protection.

// ---------------------------------------
// 2. AES Encrypted Zip
//
// AES encryption is a more modern and secure method for encrypting ZIP archives.
// It provides strong encryption based on the AES algorithm, which is widely regarded as secure.
// AES supports different key lengths, typically 128-bit, 192-bit, and 256-bit.

// When opening an encrypted zip, your application only needs to provide the correct password.
// The information about the type of encryption and the key length (if AES) is already embedded within the encrypted .zip.

// Provide the decrypt password because we are opening an existing .zip (decrypting)
$zip->DecryptPassword = 'thePassword';

try {
    $zip->OpenZip('qa_data/zips/encryptedSamples/ziptest_256.zip');
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo 'Num entries = ', $zip->NumEntries, "\n";

// ...
// ...

$zip->CloseZip();