extract *.gz files and remove error logs for the next step

extract.php

<?php
$dir = __DIR__ . "/nginx";
foreach (new DirectoryIterator($dir) as $item) {
    if (!$item->isFile()) continue;
    if (strpos($item, 'access')===false) {
        unlink($item->getPathname());
        continue;
    }
    if (!strpos($item, '.gz')) continue;
    system('gunzip ' . escapeshellarg($item->getPathname()));
}