Timothy J Warren
f31fe826b0
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134 lines
2.4 KiB
PHP
134 lines
2.4 KiB
PHP
<?php declare(strict_types=1);
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/**
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* Banker
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*
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* A Caching library implementing psr/cache (PSR 6)
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*
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* PHP version 7.2
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*
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* @package Banker
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* @author Timothy J. Warren <tim@timshomepage.net>
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* @copyright 2016 - 2019 Timothy J. Warren
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* @license http://www.opensource.org/licenses/mit-license.html MIT License
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* @version 3.0.0
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* @link https://git.timshomepage.net/timw4mail/banker
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*/
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namespace Aviat\Banker\Driver;
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/**
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* Cache backend for use without a cache server. Only does transient
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* in-memory caching
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*/
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class NullDriver extends AbstractDriver {
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/**
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* In memory store
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*
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* @var array
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*/
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protected array $store = [];
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/**
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* NullDriver constructor.
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*
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* @param array $config
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* @param array $options
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*/
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public function __construct(array $config = [], array $options = [])
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{
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$this->store = [];
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}
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/**
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* See if a key currently 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 exists(string $key): bool
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{
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return array_key_exists($key, $this->store);
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}
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/**
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* Get the value for the selected cache key
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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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public function get(string $key)
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{
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return $this->exists($key)
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? $this->store[$key]
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: NULL;
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}
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/**
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* Set a cached value
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*
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* @param string $key
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* @param mixed $value
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* @param int $expires
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* @return bool
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*/
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public function set(string $key, $value, int $expires = 0): bool
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{
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$this->store[$key] = $value;
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return $this->store[$key] === $value;
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}
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/**
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* Remove an item from the cache
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*
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* @param string $key
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* @return boolean
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*/
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public function delete(string $key): bool
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{
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unset($this->store[$key]);
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return ( ! array_key_exists($key, $this->store));
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}
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/**
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* Remove multiple items from the cache
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*
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* @param string[] $keys
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* @return boolean
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*/
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public function deleteMultiple(array $keys = []): bool
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{
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$res = TRUE;
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foreach($keys as $key)
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{
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$res = $res && $this->delete($key);
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}
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return $res;
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}
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/**
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* Empty the cache
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*
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* @return boolean
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*/
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public function flush(): bool
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{
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$this->store = [];
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return TRUE;
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}
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/**
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* Set the specified key to expire at the given time
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*
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* @param string $key
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* @param int $expires
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* @return boolean
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*/
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public function expiresAt(string $key, int $expires): bool
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{
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//noop
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return array_key_exists($key, $this->store);
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}
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} |