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.

Download Chilkat 32-bit Zip ActiveX (.msi) (includes objects for .zip, .gz, .bz2, and .Z)

Download All 32-bit Chilkat ActiveX Components (.zip)

Download All 64-bit Chilkat ActiveX Components (.zip)

<?php

$zip = new COM("Chilkat.Zip2");

//  Any string unlocks the component for the 1st 30-days.
$success = $zip->UnlockComponent('Anything for 30-day trial');
if ($success != true) {
    print $zip->lastErrorText() . "\n";
    exit;
}

//  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 = $zip->OpenZip('hamlet.zip');
if ($success != true) {
    print $zip->lastErrorText() . "\n";
    exit;
}

$entry = $zip->GetEntryByName('hamlet.xml');
if (!(is_null($entry))) {
    $xmlText = $entry->inflateToString2();
    print $xmlText . "\n";

}
else {
    print 'Failed to find entry in zip' . "\n";
}

?>