banker/README.md

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# Banker
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A Caching library implementing the PSR-6 interface for several common cache
backends
## Cache Backends
* Memcache
* Memcached
* Redis
* Null - no persistence
### Basic Usage
```php
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<?php
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// Create the pool
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// $config is the configuration array
// $logger is an optional psr/log compatible logger
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$pool = new Aviat\Banker\Pool($config, $logger);
// Grab an item from the cache
$item = $pool->getItem('foo');
// Was there a cache hit?
if ( ! $item->isHit())
{
// ... Generation of value to cache
$item->set($value);
$item->save();
}
else
{
$value = $item->get();
}
```
#### Configuration / Connection array
The config array passed to the Pool class constructor determines
which server to connect to. Regardless of the backend, the basic
structure is like so:
```php
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<?php
$config = [
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'driver' => 'null', // null, redis, memcache, memcached
'connection' => [
// driver setup, see below for the structure for each
// driver
],
'options' => [
// Optional:
// Set additional driver-specific options, like persistence for
// Memcached, or a prefix for Redis keys
]
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];
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```
Below are the connection arrays for each backend:
Memcache / Memcached:
```php
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<?php
$config['connection'] = [
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'host' => 'localhost', // hostname or socket
'port' => 11211, // Port needs to be 0 if socket
'persistent' => false, // Use persistent connection
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];
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```
Redis:
See [Predis](https://github.com/nrk/predis#connecting-to-redis) documentation. An empty array will connect to localhost on port 6379.
Null:
No connection parameters