PHP8 ZipArchive EM constant TRAD_PKWARE not working

Question

i used ZipArchive::EM_TRAD_PKWARE, with password, but zip file is not encrypted. I think that pkware not working. Have solutions ?

Thx

$zip->setEncryptionName('test.txt', ZipArchive::EM_TRAD_PKWARE, 'PASSWORD'); 

Answer 1

I got it working by the following example and rules:

Two rules to make it work

I got inconsistent results when not following these 2 rules:

1. Make sure the file to be encrypted contains data
2. Make sure addFile is called before setEncryptionName

Working example

test.txt

Create the following test.txt file with the following content:

test

test.php

Add the following PHP code to test.php:

$zip = new ZipArchive();
$zip->open("test.zip", ZipArchive::CREATE);
$zip->addFile("test.txt");
$zip->setEncryptionName('test.txt', ZipArchive::EM_TRAD_PKWARE, 'PASSWORD'); 
$zip->close();

Run test.php

php test.php

A zip file is now created which prompts for a password on unzip.