simple file base cache for php

README.md

How to Use

Set

require 'fvs.php';
$cache = new Fvs();

$cache->set('hoge', 'hello'); // hello

Get

require 'fvs.php';

$cache = new Fvs();
$cache->set('hoge', 'hello'); // hello
$cache->get('hoge'); // hello

List Keys

require 'fvs.php';
$cache = new Fvs();

foreach(range(1, 10) as $i) {
    $cache->set('nick'. $i, $i);
}

$cache->keys();

// array(10) {
//   [0]=>
//   string(6) " nick1"
//   [1]=>
//   string(7) " nick10"
//   [2]=>
//   string(6) " nick2"
//   [3]=>
//   string(6) " nick3"
//   [4]=>
//   string(6) " nick4"
//   [5]=>
//   string(6) " nick5"
//   [6]=>
//   string(6) " nick6"
//   [7]=>
//   string(6) " nick7"
//   [8]=>
//   string(6) " nick8"
//   [9]=>
//   string(6) " nick9"
// }

Delete

require 'fvs.php';
$cache = new Fvs();

$cache->set('hoge', 'hello');
$cache->del('hoge'); // hello
$cache->get('hoge'); // null

Multi Key Delete

require 'fvs.php';
$cache = new Fvs();

$cache->set('hoge', 1);
$cache->set('fuga', 1);
$cache->del(['hoge','fuga']) // 2
$cache->get('hoge'); // null
$cache->set('hoge'); // null

Flush All

require 'fvs.php';
$cache = new Fvs();

foreach(range(1, 10) as $i) {
    $fvs->set('nick'. $i, $i);
}

foreach (range(1, 10) as $i) {
    echo ($fvs->get('nick'. $i). PHP_EOL);
}

$fvs->flushall();

fvs.php

<?php

class Fvs
{
    private $cache_path;
    private $file_ext;

    /**
     * @param string $cache_path
     * @param string $file_ext
     */
    public function __construct($cache_path = '.caches/', $file_ext = '.cache')
    {
        if (!file_exists($cache_path)) {
            mkdir($cache_path);
        }

        $this->cache_path = $cache_path;
        $this->file_ext = $file_ext;
    }

    /**
     * @param $key_name
     * @return mixed
     */
    public function get($key_name)
    {
        $file_name = $this->file_name($key_name);
        if (file_exists($file_name)) {
            return file_get_contents($file_name);
        }
    }

    /**
     * @param string $key_name
     * @param $value
     * @return mixed
     */
    public function set($key_name, $value)
    {
        file_put_contents($this->file_name($key_name), $value);
        return $value;
    }

    /**
     * @param mixed $key_names
     * @return int
     */
    public function del($key_names)
    {
        if (is_array($key_names)) {
            return $this->multi_del($key_names);
        }
        return $this->single_del($key_names);
    }

    public function flushall()
    {
        if ($dirHandle = opendir($this->cache_path)) {
            while (false !== ($fileName = readdir($dirHandle))) {
                if ($fileName !== ".") {
                    unlink($this->cache_path . $fileName);
                }
            }
            closedir($dirHandle);
        }
    }

    /**
     * @return array
     */
    public function keys()
    {
        $search_value = $this->cache_path . '*.fvs';
        $keys = [];
        $values = glob($search_value);
        foreach ($values as $v) {
            $k_name = preg_replace("/(.+)(\.[^.]+$)/", "$1", str_replace($this->cache_path, ' ', $v));
            $keys[] = $k_name;
        }
        return $keys;
    }


    /**
     * @param array $key_names
     * @return int
     */
    private function multi_del($key_names)
    {
        $result = 0;
        foreach ($key_names as $k) {
            $file_name = $this->file_name($k);
            if (unlink($file_name)) {
                $result += 1;
            }
        }
        return $result;
    }

    /**
     * @param string $key_name
     * @return int
     */
    private function single_del($key_name)
    {
        if (unlink($this->file_name($key_name))) {
            return 1;
        }
        return 0;
    }

    /**
     * @param string $key_name
     * @return string
     */
    private function file_name($key_name)
    {
        return $this->cache_path . $key_name . $this->file_ext;
    }

}

test.php

<?php
require 'fvs.php';

$fvs = new Fvs();

foreach(range(1, 10) as $i) {
    $fvs->set('nick'. $i, $i);
}

foreach (range(1, 10) as $i) {
    echo ($fvs->get('nick'. $i). PHP_EOL);
}

$fvs->flushall();