<?php

require "libs/LazyCollection.php";

$lazyCollection = LazyCollection::make(function () {
    try {
        $handle = fopen('huge.txt', 'r');
        if (!$handle) throw new Exception("Could not open file");

        while (($line = fgets($handle)) !== false) {
            yield $line;
        }
    } finally {
        if (isset($handle) && is_resource($handle)) {
            fclose($handle);
        }
    }
});

ob_start();
$lazyCollection->each(function ($line) {
    echo $line;
    ob_flush();
    flush();
});
ob_end_flush();