Open Zip and Save Password Protected

Open a .zip (non-encrypted) and then save it password-protected.

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;
}

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

//  Set a password and indicate that password protection
//  should be used when writing the .zip
$zip->EncryptPassword = 'secret';
$zip->PasswordProtect = true;

//  Write the zip (overwrites test.zip)
$success = $zip->WriteZipAndClose();
if ($success != true) {
    print $zip->lastErrorText() . "\n";
    exit;
}

print 'Zip Re-Written with Password Protection!' . "\n";
?>