PSR-6 is a PHP-FIG (PHP Framework Interoperability Group) standard that defines a common interface for caching in PHP applications. This specification, titled "Caching Interface," aims to promote interoperability between caching libraries by providing a standardized API.
Key components of PSR-6 are:
Cache Pool Interface (CacheItemPoolInterface
): Represents a collection of cache items. It's responsible for managing, fetching, saving, and deleting cached data.
Cache Item Interface (CacheItemInterface
): Represents individual cache items within the pool. Each cache item contains a unique key and stored value and can be set to expire after a specific duration.
Standardized Methods: PSR-6 defines methods like getItem()
, hasItem()
, save()
, and deleteItem()
in the pool, and get()
, set()
, and expiresAt()
in the item interface, to streamline caching operations and ensure consistency.
By defining these interfaces, PSR-6 allows developers to easily switch caching libraries or integrate different caching solutions without modifying the application's core logic, making it an essential part of PHP application development for caching standardization.