PHP - Archivo zip bajado con tamaño 0 o vacio./volume1/web/familia/fotos/album/rodriguezobject(ZipArchive)

function comprimir($dir) {

  // Get real path for our folder

$rootPath = realpath($dir);

// Initialize archive object

$zip = new ZipArchive();

$filename = "../../fotos/zip/Fotos.zip";

$zip->open($filename, ZipArchive::CREATE | ZipArchive::OVERWRITE);

// Create recursive directory iterator

/** @var SplFileInfo[] $files */

$files = new RecursiveIteratorIterator(

    new RecursiveDirectoryIterator($rootPath),

    RecursiveIteratorIterator::LEAVES_ONLY

);

foreach ($files as $name => $file)

{

    // Skip directories (they would be added automatically)

    if (!$file->isDir())

    {

        // Get real and relative path for current file

        $filePath = $file->getRealPath();

        $relativePath = substr($filePath, strlen($rootPath) + 1);

        // Add current file to archive

        $zip->addFile($filePath, $relativePath);

    }

}

var_dump($zip);

// Zip archive will be created only after closing object

$zip->close();

$fileName = basename($filename);

//$filePath = 'files/'.$fileName;

if(!empty($filename) && file_exists($filename)){

    // Define headers

  header("Cache-Control: public");

    header("Content-Description: File Transfer");

    header("Content-Disposition: attachment; filename=$fileName");

	header('Content-Length: ' . filesize($fileName));

    header("Content-Type: application/zip");

    header("Content-Transfer-Encoding: binary");

    // Read the file

    readfile($filename);

    exit;

}else{

    echo 'The file does not exist.';

}

//Limpiando archivo

 //unlink($filename);

}

Allowed memory size of 134217728 bytes exhausted