loreal-global-kickoff/download-all-csv.php

<?php
/**
 * Download All CSV Files as ZIP
 */

session_start();

// Check if processed data exists
if (!isset($_SESSION['processed_csv'])) {
    http_response_code(404);
    echo 'No processed data found';
    exit;
}

$processedData = $_SESSION['processed_csv'];
$csvFiles = $processedData['files'];
$campaignNumber = $processedData['campaignNumber'];
$businessUnit = $processedData['businessUnit'];

// Create ZIP file
$zipFilename = "OMG{$campaignNumber}_{$businessUnit}_AllFiles_" . time() . ".zip";
$zipPath = sys_get_temp_dir() . '/' . $zipFilename;

$zip = new ZipArchive();

if ($zip->open($zipPath, ZipArchive::CREATE | ZipArchive::OVERWRITE) !== TRUE) {
    http_response_code(500);
    echo 'Failed to create ZIP file';
    exit;
}

// Add each CSV to the ZIP
foreach ($csvFiles as $csvFile) {
    $zip->addFromString($csvFile['filename'], $csvFile['content']);
}

$zip->close();

// Set headers for download
header('Content-Type: application/zip');
header('Content-Disposition: attachment; filename="' . $zipFilename . '"');
header('Content-Length: ' . filesize($zipPath));

// Output file
readfile($zipPath);

// Clean up temp file
unlink($zipPath);