Dead simple cheatdb replacement

simpe_cheatdb.php

<?php
// Minimum viable cheatdb replacement.
// Needs a directory of clientmods at ./packages
// Run with php -S 127.0.0.1:8080 simple_cheatdb.php
// Set dragonfire contentdb_url setting to http://127.0.0.1:8080
// Needs php-zip (e.g. apt install php8.2-zip in debian)

$packs = scandir("./packages");
error_log($_SERVER['REQUEST_URI']);
$rq = explode("/", $_SERVER['REQUEST_URI']);
$out = '';
error_log(count($rq));

function zip_folder($rootPath, $output_zip_file) {
	$rootPath = rtrim($rootPath, '\\/');
	$rootPath = realpath($rootPath);
	$zip = new ZipArchive();
	$zip->open($output_zip_file, ZipArchive::CREATE | ZipArchive::OVERWRITE);

	$files = new RecursiveIteratorIterator(
		new RecursiveDirectoryIterator($rootPath),
		RecursiveIteratorIterator::LEAVES_ONLY
	);

	foreach ($files as $file)
	{
		if (!$file->isDir())
		{
			$filePath = $file->getRealPath();
			$relativePath = substr($filePath, strlen($rootPath) + 1);
			if(substr($relativePath, 0, 4) == ".git") continue;
			$zip->addFile($filePath, $relativePath);
		}
	}
	$zip->close();
}

if(count($rq) <= 4) {
	error_log("LIST");
	$chdb = array();
	foreach($packs as $file) {
		if($file == "." or $file == ".." or $file == "index.php") continue;
		$r = array();
		$r["name"] = $file;
		$r["title"] = $file;
		$r["author"] = "lol";
		$r["type"] = "mod";
		$r["release"] = 1;
		$chdb[] = $r;
	}
	$out=json_encode($chdb);
} elseif(count($rq) == 6) {
	error_log("PACK");
	$r = array();
	$r["author"] = $rq[3];
	$r["title"] = $rq[4];
	$r["name"] = $rq[4];
	$r["release"] = 1;
	$r["provides"] = array($rq[4]);
	$out=json_encode($r);
} elseif(count($rq) >= 6 and $rq[5] == "dependencies") {
	error_log("DEP");
	$out='{ "'.$rq[3].'/'.$rq[4].'":[]}';

} elseif(count($rq) >= 6 and $rq[6] == "download") {
	error_log("DL");
	$dir="./packages/".$rq[3];
	error_log($dir);
	$filename = "./pack.zip";

	zip_folder($dir, $filename);
	header("Content-type: application/zip");
	header("Content-Disposition: attachment; filename=".$rq[3].".zip");
	header("Content-length: " . filesize($filename));
	header("Pragma: no-cache");
	header("Expires: 0");
	readfile("$filename");
	die();
}

die($out);
?>