progress(function ($client, $download_size, $downloaded, $upload_size, $uploaded){ if ($download_size === 0) { return; } $progress = floor( $downloaded * 100 / $download_size ); echo ' ' . $progress . '%' . "\r"; }); $curl->download('https://php.net/distributions/manual/php_manual_en.html.gz', '/tmp/php_manual_en.html.gz');