MIF_E31222691/system/cache/driver/file.php

66 lines
1.1 KiB
PHP

<?php namespace System\Cache\Driver;
class File implements \System\Cache\Driver {
/**
* Determine if an item exists in the cache.
*
* @param string $key
* @return bool
*/
public function has($key)
{
return ( ! is_null($this->get($key)));
}
/**
* Get an item from the cache.
*
* @param string $key
* @param mixed $default
* @return mixed
*/
public function get($key)
{
if ( ! file_exists(CACHE_PATH.$key))
{
return null;
}
$cache = file_get_contents(CACHE_PATH.$key);
if (time() >= substr($cache, 0, 10))
{
$this->forget($key);
return null;
}
return unserialize(substr($cache, 10));
}
/**
* Write an item to the cache.
*
* @param string $key
* @param mixed $value
* @param int $minutes
* @return void
*/
public function put($key, $value, $minutes)
{
file_put_contents(CACHE_PATH.$key, (time() + ($minutes * 60)).serialize($value), LOCK_EX);
}
/**
* Delete an item from the cache.
*
* @param string $key
* @return void
*/
public function forget($key)
{
@unlink(CACHE_PATH.$key);
}
}