Use file_get_contents instead of SplFileObject::fpassthru()

gistfile1.php

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

ini_set('memory_limit', '500M');

use Symfony\Component\Finder\Finder;

$finder = new Finder();
$finder->files()
        ->in(__DIR__ . "/../")
        ->name("access_proxy_log*");

$patternPodcast = "/podcasts/";

foreach ($finder as $file) {
        $contents = $file->getContents();

        preg_match_all($patternPodcast, $contents, $matches);

        unset($contents);
        unset($matches);
}

?>