Sample for issue reactphp/filesystem

.php

<?php
require __DIR__ . '/vendor/autoload.php';

$loop = \React\EventLoop\Factory::create();
$filesystem = \React\Filesystem\Filesystem::create($loop);

$file_targets = [
    'file1.xml',
    'file2.xml',
    'file3.xml',
    'file4.xml',
    'file5.xml',
    'file6.xml',
    'file7.xml',
    'file8.xml',
    'file9.xml',
    'file10.xml'
];

foreach($file_targets as $index => $target)
{
    $index += 1;
    $file = $filesystem->file( __DIR__ . DS . 'downloads' . DS . $target );
    $stream = \React\Promise\Stream\unwrapReadable( $file->open('r') );

    $buffer = '';
    $stream->on('data', function($data) use (&$buffer, $index, $target) {
        $buffer .= $data;
        echo str_repeat("\033[1A", $index), "Bytes loaded for file {$target}: ", strlen($buffer), str_repeat(PHP_EOL, $index);
    });

    $stream->on('error', function(Exception $e) use ($target, $index) {
        echo str_repeat("\033[1A", $index), "Opening {$target} produced some error: ", $e->getMessage(), str_repeat(PHP_EOL, $index);
    });
}
echo str_repeat(PHP_EOL, count($file_targets));

$loop->run();