whmcsDNSManager/modules/addons/DNSManager2/mgLibs/custom/cache/FileCache.php

<?php

namespace MGModule\DNSManager2\mgLibs\custom\cache;

class FileCache implements CacheInterface {
    private $name;
    
    public function __construct($cache_name) {
        $this->name = __DIR__ . DIRECTORY_SEPARATOR . 'storage' . DIRECTORY_SEPARATOR . $cache_name;
    }

    public function exist() {
        return file_exists($this->name);
    }

    public function get() {
        return unserialize(@file_get_contents($this->name));
    }

    public function remove() {
        @unlink($this->name);
    }

    public function save($data) {
        try{
            $data = serialize($data);
        } catch (\Exception $ex) {
            $data = serialize(\MGModule\DNSManager2\mgLibs\custom\helpers\SerializeXMLObject::getInstance($data)->refactor());
        }
        @file_put_contents($this->name, $data);
    }    
}