(PHP Extension) Unzip an AES Encrypted Text File directly into a String Variable

A common need is to unzip from an AES encrypted Zip archive directly into a string variable, such that the unencrypted file never resides on disk, even temporarily. This example shows how to do it.

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

$zip = new CkZip();

// This example opens a WinZip-compatible AES encrypted
// .zip that contains a single file: hamlet.xml.

// It decrypts and unzips hamlet.xml directly into a string
// variable.
$zip->SetPassword('secret');
$success = $zip->OpenZip('qa_data/hamlet.zip');
if ($success != true) {
    print $zip->lastErrorText() . "\n";
    exit;
}

// entry is a CkZipEntry
$entry = $zip->GetEntryByName('hamlet.xml');
if ($zip->get_LastMethodSuccess() == false) {
    print 'Failed to find entry in zip' . "\n";
    exit;
}

// lineEndingBehavior:
// 0 = leave unchanged.
// 1 = convert all to bare LF's
// 2 = convert all to CRLF's
$lineEndingBehavior = 0;
$srcCharset = 'utf-8';
$xmlText = $entry->unzipToString($lineEndingBehavior,$srcCharset);
print $xmlText . "\n";


?>