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Developer Documentation
See Release Notes
Long Term Support Release
- Bug fixes for general core bugs in 3.9.x will end* 10 May 2021 (12 months).
- Bug fixes for security issues in 3.9.x will end* 8 May 2023 (36 months).
- PHP version: minimum PHP 7.2.0 Note: minimum PHP version has increased since Moodle 3.8. PHP 7.3.x and 7.4.x are supported too.
/cache/stores/session/ -> lib.php (source)
The library file for the session cache store. This file is part of the session cache store, it contains the API for interacting with an instance of the store. This is used as a default cache store within the Cache API. It should never be deleted.
| Copyright: | 2012 Sam Hemelryk |
| License: | http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later |
| File Size: | 595 lines (18 kb) |
| Included or required: | 0 times |
| Referenced: | 0 times |
| Includes or requires: | 0 files |
Defines 2 classes
session_data_store:: (3 methods):
register_store_id()
flush_store_by_id()
flush_store()
cachestore_session:: (28 methods):
__construct()
get_supported_features()
supports_multiple_identifiers()
get_supported_modes()
are_requirements_met()
is_supported_mode()
initialise()
is_initialised()
get()
get_many()
set()
set_many()
has()
has_all()
has_any()
delete()
delete_many()
purge()
reduce_for_maxsize()
can_add_instance()
instance_deleted()
initialise_test_instance()
unit_test_configuration()
my_name()
check_ttl()
find_all()
find_by_prefix()
store_supports_native_ttl()
Class: session_data_store - X-Ref
The session data store class.| register_store_id($id) X-Ref |
| Returns a static store by reference... REFERENCE SUPER IMPORTANT. param: string $id return: array |
| flush_store_by_id($id) X-Ref |
| Flushes the data belong to the given store id. param: string $id |
| flush_store() X-Ref |
| Flushes the store of all data. |
Class: cachestore_session - X-Ref
The Session store class.| __construct($name, array $configuration = array() X-Ref |
| Constructs the store instance. Noting that this function is not an initialisation. It is used to prepare the store for use. The store will be initialised when required and will be provided with a cache_definition at that time. param: string $name param: array $configuration |
| get_supported_features(array $configuration = array() X-Ref |
| Returns the supported features as a combined int. param: array $configuration return: int |
| supports_multiple_identifiers() X-Ref |
| Returns false as this store does not support multiple identifiers. (This optional function is a performance optimisation; it must be consistent with the value from get_supported_features.) return: bool False |
| get_supported_modes(array $configuration = array() X-Ref |
| Returns the supported modes as a combined int. param: array $configuration return: int |
| are_requirements_met() X-Ref |
| Returns true if the store requirements are met. return: bool |
| is_supported_mode($mode) X-Ref |
| Returns true if the given mode is supported by this store. param: int $mode One of cache_store::MODE_* return: bool |
| initialise(cache_definition $definition) X-Ref |
| Initialises the cache. Once this has been done the cache is all set to be used. param: cache_definition $definition |
| is_initialised() X-Ref |
| Returns true once this instance has been initialised. return: bool |
| get($key) X-Ref |
| Retrieves an item from the cache store given its key. param: string $key The key to retrieve return: mixed The data that was associated with the key, or false if the key did not exist. |
| get_many($keys) X-Ref |
| Retrieves several items from the cache store in a single transaction. If not all of the items are available in the cache then the data value for those that are missing will be set to false. param: array $keys The array of keys to retrieve return: array An array of items from the cache. There will be an item for each key, those that were not in the store will |
| set($key, $data, $testmaxsize = true) X-Ref |
| Sets an item in the cache given its key and data value. param: string $key The key to use. param: mixed $data The data to set. param: bool $testmaxsize If set to true then we test the maxsize arg and reduce if required. If this is set to false you will return: bool True if the operation was a success false otherwise. |
| set_many(array $keyvaluearray) X-Ref |
| Sets many items in the cache in a single transaction. param: array $keyvaluearray An array of key value pairs. Each item in the array will be an associative array with two return: int The number of items successfully set. It is up to the developer to check this matches the number of items |
| has($key) X-Ref |
| Checks if the store has a record for the given key and returns true if so. param: string $key return: bool |
| has_all(array $keys) X-Ref |
| Returns true if the store contains records for all of the given keys. param: array $keys return: bool |
| has_any(array $keys) X-Ref |
| Returns true if the store contains records for any of the given keys. param: array $keys return: bool |
| delete($key) X-Ref |
| Deletes an item from the cache store. param: string $key The key to delete. return: bool Returns true if the operation was a success, false otherwise. |
| delete_many(array $keys) X-Ref |
| Deletes several keys from the cache in a single action. param: array $keys The keys to delete return: int The number of items successfully deleted. |
| purge() X-Ref |
| Purges the cache deleting all items within it. return: boolean True on success. False otherwise. |
| reduce_for_maxsize() X-Ref |
| Reduces the size of the array if maxsize has been hit. This function reduces the size of the store reducing it by 10% of its maxsize. It removes the oldest items in the store when doing this. The reason it does this an doesn't use a least recently used system is purely the overhead such a system requires. The current approach is focused on speed, MUC already adds enough overhead to static/session caches and avoiding more is of benefit. return: int |
| can_add_instance() X-Ref |
| Returns true if the user can add an instance of the store plugin. return: bool |
| instance_deleted() X-Ref |
| Performs any necessary clean up when the store instance is being deleted. |
| initialise_test_instance(cache_definition $definition) X-Ref |
| Generates an instance of the cache store that can be used for testing. param: cache_definition $definition return: cachestore_session |
| unit_test_configuration() X-Ref |
| Generates the appropriate configuration required for unit testing. return: array Array of unit test configuration data to be used by initialise(). |
| my_name() X-Ref |
| Returns the name of this instance. return: string |
| check_ttl() X-Ref |
| Removes expired elements. return: int number of removed elements |
| find_all() X-Ref |
| Finds all of the keys being stored in the cache store instance. return: array |
| find_by_prefix($prefix) X-Ref |
| Finds all of the keys whose keys start with the given prefix. param: string $prefix return: array An array of keys. |
| store_supports_native_ttl() X-Ref |
| This store supports native TTL handling. return: bool |
