Slick Cache package

Slick cache package works with cache providing services installed on your system.

It comes with support for Memcached (memcached daemon) and File (caching data into files) out of the box, but it also defines a driver interface that allows you to add your own drivers to your project.

Install

Via Composer

$ composer require slick/cache

Usage

To use a cache driver you simple need to call the Cache::get() static method to get an initialized cache driver. Check the following example:

use Slick\Cache\Cache;

$cache = Cache::get();
$data = $cache->get('data', false);

if (!$data) {
    $data = file_get_contents("http://www.example.com/api/call.json");
    $cache->set('data', $data);
}

In this example we are using the default cache driver with default options, to store some expensive API call data.

note

The default driver is Memcached with the following default options:

• duration => 120
• host => ‘127.0.0.1’
• port => 11211

Changing cache expire time

The expire amount of time is always set when you set a value on the cache driver. As mention above, the default is set to 120 seconds. Using the above example, we will set the time expire amount to 3 minutes for the data from our fictitious API call:

use Slick\Cache\Cache;

$cache = Cache::get();
$data = $cache->get('data', false);
if (!$data) {
    $data = file_get_contents("http://www.example.com/api/call.json");
    // Set expire to 3 minutes
    $cache->set('data', $data, 3*60);
}

It is also possible to define a global expire amount of time for all Cache::set() like this:

use Slick\Cache\Cache;

$cache = Cache::get();
// Set global cache expire to 10 minutes
$cache->duration = 10*60;

$data = $cache->get('data', false);
if (!$data) {
    $data = file_get_contents("http://www.example.com/api/call.json");
    // This will use the 10 minutes setting from above
    $cache->set('data', $data);
}

Slick\Cache\DriverInterface::set()

Set/stores a value with a given key. If no value is set in the expire parameter the default Cache::duration will be used.

public DriverInterface DriverInterface::set(string $key, mixed $value [, int $expire = -1])

Parameters	Type	Description
$key	string	The key where value will be stored
$value	mixed	The value to store
$expire	int	The live time of cache in seconds

Return	Description
Slick\Cache\DriverInterface	A DriverInterface instance for chaining method calls.

Slick\Cache\DriverInterface::get()

Retrieves a previously stored value. You can optionally set the value returned in case of cache driver has no value for provided key.

public mixed DriverInterface::get(string $key [, mixed $default = false])

Parameters	Type	Description
$key	string	The key where value was stored
$default	mixed	The value returned if cache driver has no value for provided key

Return	Description
mixed	The stored value or the default value if cache driver has no value for provided key

Slick\Cache\DriverInterface::erase()

Erase the value stored with a given key. You can use the “?” and “" wildcards to delete all matching keys. The "?" means a place holders for one unknown character, the "” is a place holder for various

public DriverInterface DriverInterface::erase(string $key)

Parameters	Type	Description
$key	string	The key where value was stored

Return	Description
Slick\Cache\DriverInterface	A DriverInterface instance for chaining method calls.

warning

The use of “?” and “*” placeholder is only implemented in the drivers that are provided by Slick cache component. If you create your own cache driver you need to handle the placeholders key search implementation.

tip

If you are implementing your own cache driver and want to have the “?” and “*” placeholders search you can extend Slick\Cache\Driver\AbstractDriver witch uses the DriverInterface::get() and DriverInterface::set() methods to achieve the wildcards key search feature.

Testing

$ vendor/bin/phpunit

Contributing

Please see CONTRIBUTING for details.

Security

If you discover any security related issues, please email [email protected] instead of using the issue tracker.

Credits

• Slick framework
• All Contributors

License

The MIT License (MIT). Please see License File for more information.