// ZIP-Archive mit Passwortschutz erstellen

<?php

function zipFolder(string $folder,string $target,string $password = ""):bool{
    $files  = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($folder,FilesystemIterator::SKIP_DOTS));
    $zip    = new ZipArchive;
    $create = $target . '.zip';

    if($zip->open($create,ZipArchive::CREATE)):

        if(!empty($password)):
            $zip->setPassword($password);
        endif;

        foreach($files as  $file):
            $zip->addFile(realpath($file),$file);

            if(!empty($password)):
                $zip->setEncryptionName($file, ZipArchive::EM_AES_256);
            endif;

            print($file . " - Datei Hinzugefügt ". PHP_EOL);
        endforeach;

        $zip->close();    
    endif;

    return file_exists($create);
}

if(zipFolder('bilder','bilder-archive-pwd','passwort')):
    print("ZIP File Erstellt");
endif;