Forgecraft-manifest-downloader PHP

download.php

<?php

function relativeDirectory($path) {
    return __DIR__ . "/" . $path;
}

$manifestPath = relativeDirectory("manifest.json");
$downloadDir = relativeDirectory("mods");
$userAgent = "CurseForge/Downloader+1.0";
$cookieFile = relativeDirectory("cookies.txt"); // Optional. Comment this line out if not using cookies.

if (!file_exists($manifestPath)) {
    die("manifest.json not found\n");
}

$manifest = json_decode(file_get_contents($manifestPath), true);
if (!is_array($manifest) || !isset($manifest['files'])) {
    die("Invalid manifest.json format\n");
}

// Create downloads directory
if (!is_dir($downloadDir)) {
    mkdir($downloadDir, 0777, true);
}

foreach ($manifest['files'] as $file) {
    $projectID = $file['projectID'];
    $fileID = $file['fileID'];

    $metaUrl = "https://www.curseforge.com/api/v1/mods/$projectID/files/$fileID";
    $downloadUrl = "https://www.curseforge.com/api/v1/mods/$projectID/files/$fileID/download";

    echo "Fetching metadata for project $projectID, file $fileID...\n";

    $meta = curlGetJson($metaUrl, $userAgent, $cookieFile);
    if (!$meta || !isset($meta['data']['fileName'])) {
        echo "Failed to retrieve fileName\n";
        continue;
    }

    $fileName = $meta['data']['fileName'];
    $outputPath = "$downloadDir/$fileName";

    echo "Downloading $fileName...\n";

    $success = curlDownload($downloadUrl, $outputPath, $userAgent, $cookieFile);
    if ($success) {
        echo "Downloaded to $outputPath\n";
    } else {
        echo "Failed to download $fileName\n";
    }
}

function curlGetJson($url, $userAgent, $cookieFile = null)
{
    $ch = curl_init($url);
    curl_setopt_array($ch, [
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_USERAGENT => $userAgent,
        CURLOPT_FOLLOWLOCATION => true,
    ]);
    if ($cookieFile) {
        curl_setopt($ch, CURLOPT_COOKIEFILE, $cookieFile);
        curl_setopt($ch, CURLOPT_COOKIEJAR, $cookieFile);
    }
    $response = curl_exec($ch);
    curl_close($ch);
    return json_decode($response, true);
}

function curlDownload($url, $savePath, $userAgent, $cookieFile = null)
{
    $fp = fopen($savePath, 'w');
    if (!$fp) return false;

    $ch = curl_init($url);
    curl_setopt_array($ch, [
        CURLOPT_FILE => $fp,
        CURLOPT_USERAGENT => $userAgent,
        CURLOPT_FOLLOWLOCATION => true,
    ]);
    if ($cookieFile) {
        curl_setopt($ch, CURLOPT_COOKIEFILE, $cookieFile);
        curl_setopt($ch, CURLOPT_COOKIEJAR, $cookieFile);
    }

    $success = curl_exec($ch);
    curl_close($ch);
    fclose($fp);

    return $success;
}

relativeDirectory could change.
What Might be a better option would be to build a separate script which can do the download, and then sub-process / thread that part... IDK, I like simplicity of a <100 line file today.

2025 may php 8.4.7 used to test this on the all the mods 10-2.47 modpack