140 lines
2.4 KiB
PHP
140 lines
2.4 KiB
PHP
<?php namespace Laravel\Cache;
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/**
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* Wrap the file functions in a class that can be injected into driver.
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* Since the file functions are global, the driver is untestable without
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* injecting a wrapper around them.
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*/
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class File_Engine {
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/**
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* Determine if a file exists.
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*
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* @param string $file
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* @return bool
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*/
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public function exists($file)
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{
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return file_exists($file);
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}
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/**
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* Get the contents of a file.
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*
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* @param string $file
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* @return string
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*/
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public function get($file)
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{
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return file_get_contents($file);
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}
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/**
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* Write to a file.
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*
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* @param string $file
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* @param string $value
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* @return void
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*/
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public function put($file, $value)
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{
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file_put_contents($file, $value, LOCK_EX);
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}
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/**
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* Delete a file.
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*
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* @param string $file
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* @return void
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*/
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public function forget($file)
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{
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@unlink($file);
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}
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}
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class File extends Driver {
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/**
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* The File cache engine.
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*
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* @var File_Engine
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*/
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private $file;
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/**
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* Create a new File cache driver instance.
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*
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* @param File_Engine $file
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* @return void
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*/
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public function __construct(File_Engine $file)
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{
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$this->file = $file;
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}
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/**
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* Determine if an item exists in the cache.
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*
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* <code>
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* // Determine if the "name" item exists in the cache
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* $exists = Cache::driver()->has('name');
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* </code>
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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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* Retrieve an item from the cache driver.
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*
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* @param string $key
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* @return mixed
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*/
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protected function retrieve($key)
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{
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if ( ! $this->file->exists(CACHE_PATH.$key)) return null;
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if (time() >= substr($cache = $this->file->get(CACHE_PATH.$key), 0, 10))
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{
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return $this->forget($key);
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}
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return unserialize(substr($cache, 10));
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}
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/**
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* Write an item to the cache for a given number of minutes.
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*
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* <code>
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* // Write the "name" item to the cache for 30 minutes
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* Cache::driver()->put('name', 'Fred', 30);
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* </code>
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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, $minutes)
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{
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$this->file->put(CACHE_PATH.$key, (time() + ($minutes * 60)).serialize($value));
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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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$this->file->forget(CACHE_PATH.$key);
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}
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} |