this is a simple file based caching system

File_Vault.php

<?php
/**
 * Created by Sam Rudloff.
 * Date: 5/14/18
 * Time: 11:26 AM
 */

class file_vault
{
    public function __construct($path)
    {
        $this->base_path = $path;

    }
    private function makePath($key)
    {
        return $this->base_path.'/'. base64_encode($key);
    }
    private function encodeData($data)
    {
        $data = serialize($data);
        return $data;
    }
    private function decodeData($data)
    {
        $data = unserialize($data);
        return $data;
    }
    public function set($key,$data)
    {
        $path = $this->makePath($key);
        $data = $this->encodeData($data);
        file_put_contents($path, $data);
    }
    public function exists($key)
    {
        $path = $this->makePath($key);
        return is_file($path);
    }
    public function clear($key)
    {
        $path = $this->makePath($key);
        unlink($path);    
    }
    public function get($key,$default=false)
    {
        $path = $this->makePath($key);
        if (is_file($path))
        {
            $data = file_get_contents($path);
            $data = $this->decodeData($data);
            return $data;
        }
        else
        {
            return $default;
        }
    }
}