CacheInterface
in
Table of Contents
Methods
- clear() : bool
- Wipes clean the entire cache's keys.
- delete() : bool
- Delete an item from the cache by its unique key.
- deleteMultiple() : bool
- Deletes multiple cache items in a single operation.
- get() : mixed
- Fetches a value from the cache.
- getMultiple() : array<string|int, mixed>|Traversable
- Obtains multiple cache items by their unique keys.
- has() : bool
- Determines whether an item is present in the cache.
- set() : bool
- Persists data in the cache, uniquely referenced by a key with an optional expiration TTL time.
- setMultiple() : bool
- Persists a set of key => value pairs in the cache, with an optional TTL.
Methods
clear()
Wipes clean the entire cache's keys.
public
clear() : bool
Return values
bool —True on success and false on failure.
delete()
Delete an item from the cache by its unique key.
public
delete(string $key) : bool
Parameters
- $key : string
-
The unique cache key of the item to delete.
Tags
Return values
bool —True if the item was successfully removed. False if there was an error.
deleteMultiple()
Deletes multiple cache items in a single operation.
public
deleteMultiple(array<string|int, mixed>|Traversable $keys) : bool
Parameters
- $keys : array<string|int, mixed>|Traversable
-
A list of string-based keys to be deleted.
Tags
Return values
bool —True if the item was successfully removed. False if there was an error.
get()
Fetches a value from the cache.
public
get(string $key[, mixed $default = null ]) : mixed
Parameters
- $key : string
-
The unique key of this item in the cache.
- $default : mixed = null
-
Default value to return if the key does not exist.
Tags
Return values
mixed —The value of the item from the cache, or $default in case of cache miss.
getMultiple()
Obtains multiple cache items by their unique keys.
public
getMultiple(array<string|int, mixed>|Traversable $keys[, mixed $default = null ]) : array<string|int, mixed>|Traversable
Parameters
- $keys : array<string|int, mixed>|Traversable
-
A list of keys that can obtained in a single operation.
- $default : mixed = null
-
Default value to return for keys that do not exist.
Tags
Return values
array<string|int, mixed>|Traversable —A list of key => value pairs. Cache keys that do not exist or are stale will have $default as value.
has()
Determines whether an item is present in the cache.
public
has(string $key) : bool
NOTE: It is recommended that has() is only to be used for cache warming type purposes and not to be used within your live applications operations for get/set, as this method is subject to a race condition where your has() will return true and immediately after, another script can remove it making the state of your app out of date.
Parameters
- $key : string
-
The cache item key.
Tags
Return values
boolset()
Persists data in the cache, uniquely referenced by a key with an optional expiration TTL time.
public
set(string $key, mixed $value[, null|int|DateInterval $ttl = null ]) : bool
Parameters
- $key : string
-
The key of the item to store.
- $value : mixed
-
The value of the item to store, must be serializable.
- $ttl : null|int|DateInterval = null
-
Optional. The TTL value of this item. If no value is sent and the driver supports TTL then the library may set a default value for it or let the driver take care of that.
Tags
Return values
bool —True on success and false on failure.
setMultiple()
Persists a set of key => value pairs in the cache, with an optional TTL.
public
setMultiple(array<string|int, mixed>|Traversable $values[, null|int|DateInterval $ttl = null ]) : bool
Parameters
- $values : array<string|int, mixed>|Traversable
-
A list of key => value pairs for a multiple-set operation.
- $ttl : null|int|DateInterval = null
-
Optional. The TTL value of this item. If no value is sent and the driver supports TTL then the library may set a default value for it or let the driver take care of that.
Tags
Return values
bool —True on success and false on failure.