82 lines
1.6 KiB
PHP
82 lines
1.6 KiB
PHP
<?php namespace System\Cache\Driver;
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class File implements \System\Cache\Driver {
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/**
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* All of the loaded cache items.
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*
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* @var array
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*/
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private $items = array();
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/**
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* Determine if an item exists in the cache.
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*
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* @param string $key
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* @return bool
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*/
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public function has($key)
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{
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return ( ! is_null($this->get($key)));
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}
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/**
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* Get an item from the cache.
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*
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* @param string $key
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* @param mixed $default
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* @return mixed
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*/
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public function get($key, $default = null)
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{
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if (array_key_exists($key, $this->items))
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{
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return $this->items[$key];
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}
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if ( ! file_exists(APP_PATH.'storage/cache/'.$key))
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{
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return $default;
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}
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$cache = file_get_contents(APP_PATH.'storage/cache/'.$key);
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// --------------------------------------------------
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// Has the cache expired? The UNIX expiration time
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// is stored at the beginning of the file.
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// --------------------------------------------------
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if (time() >= substr($cache, 0, 10))
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{
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$this->forget($key);
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return $default;
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}
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return $this->items[$key] = unserialize(substr($cache, 10));
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}
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/**
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* Write an item to the cache.
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*
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* @param string $key
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* @param mixed $value
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* @param int $minutes
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* @return void
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*/
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public function put($key, $value, $minutes)
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{
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file_put_contents(APP_PATH.'storage/cache/'.$key, (time() + ($minutes * 60)).serialize($value), LOCK_EX);
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}
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/**
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* Delete an item from the cache.
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*
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* @param string $key
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* @return void
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*/
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public function forget($key)
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{
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@unlink(APP_PATH.'storage/cache/'.$key);
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}
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} |