Namespaces
	Elgg\Core
	Activate a plugin or plugins.

Functions
	row_to_elggmetadata ($row)
	Convert a database row to a new ElggMetadata. More...

	elgg_get_metadata_from_id ($id)
	Get a specific metadata object by its id. More...

	elgg_delete_metadata_by_id ($id)
	Deletes metadata using its ID. More...

	create_metadata ($entity_guid, $name, $value, $value_type= '', $owner_guid=0, $access_id=ACCESS_PRIVATE, $allow_multiple=false)
	Create a new metadata object, or update an existing one. More...

	update_metadata ($id, $name, $value, $value_type, $owner_guid, $access_id)
	Update a specific piece of metadata. More...

	create_metadata_from_array ($entity_guid, array $name_and_values, $value_type, $owner_guid, $access_id=ACCESS_PRIVATE, $allow_multiple=false)
	This function creates metadata from an associative array of "key => value" pairs. More...

	elgg_get_metadata (array $options=array())
	Returns metadata. More...

	elgg_delete_metadata (array $options)
	Deletes metadata based on $options. More...

	elgg_disable_metadata (array $options)
	Disables metadata based on $options. More...

	elgg_enable_metadata (array $options)
	Enables metadata based on $options. More...

	elgg_get_entities_from_metadata (array $options=array())
	ElggEntities interfaces. More...

	elgg_list_entities_from_metadata ($options)
	Returns a list of entities filtered by provided metadata. More...

	_elgg_get_entity_metadata_where_sql ($e_table, $n_table, $names=null, $values=null, $pairs=null, $pair_operator= 'AND', $case_sensitive=true, $order_by_metadata=null, $owner_guids=null)
	Returns metadata name and value SQL where for entities. More...

	metadata_array_to_values ($array)
	Takes a metadata array (which has all kinds of properties) and turns it into a simple array of strings. More...

	get_metadata_url ($id)
	Get the URL for this metadata. More...

	register_metadata_as_independent ($type, $subtype= '*')
	Mark entities with a particular type and subtype as having access permissions that can be changed independently from their parent entity. More...

	is_metadata_independent ($type, $subtype)
	Determines whether entities of a given type and subtype should not change their metadata in line with their parent entity. More...

	metadata_update ($event, $object_type, $object)
	When an entity is updated, resets the access ID on all of its child metadata. More...

	_elgg_get_metadata_cache ()
	Get the global metadata cache instance. More...

	_elgg_invalidate_metadata_cache ($action, array $options)
	Invalidate the metadata cache based on options passed to various *_metadata functions. More...

	_elgg_metadata_test ($hook, $type, $value, $params)
	Metadata unit test. More...

Function Documentation

_elgg_get_entity_metadata_where_sql	(	$e_table,
		$n_table,
		$names = `null`,
		$values = `null`,
		$pairs = `null`,
		$pair_operator = `'AND'`,
		$case_sensitive = `true`,
		$order_by_metadata = `null`,
		$owner_guids = `null`
	)

Returns metadata name and value SQL where for entities.

NB: $names and $values are not paired. Use $pairs for this. Pairs default to '=' operand.

This function is reused for annotations because the tables are exactly the same.

Parameters

string	$e_table	Entities table name
string	$n_table	Normalized metastrings table name (Where entities, values, and names are joined. annotations / metadata)
array \| null	$names	Array of names
array \| null	$values	Array of values
array \| null	$pairs	Array of names / values / operands
string	$pair_operator	("AND" or "OR") Operator to use to join the where clauses for pairs
bool	$case_sensitive	Case sensitive metadata names?
array \| null	$order_by_metadata	Array of names / direction
array \| null	$owner_guids	Array of owner GUIDs

Returns: false|array False on fail, array('joins', 'wheres')

Since: 1.7.0 private

Definition at line 495 of file metadata.php.

_elgg_get_metadata_cache ( )

Get the global metadata cache instance.

Returns: ElggVolatileMetadataCache

private

Definition at line 849 of file metadata.php.

_elgg_invalidate_metadata_cache	(		$action,
		array	$options
	)

Invalidate the metadata cache based on options passed to various *_metadata functions.

Parameters

string	$action	Action performed on metadata. "delete", "disable", or "enable"
array	$options	Options passed to elgg_(delete\|disable\|enable)_metadata

Returns: void private

Definition at line 866 of file metadata.php.

_elgg_metadata_test	(	$hook,
		$type,
		$value,
		$params
	)

Metadata unit test.

Parameters

string	$hook	unit_test
string	$type	system
mixed	$value	Array of other tests
mixed	$params	Params

Returns: array private

Definition at line 902 of file metadata.php.

create_metadata	(	$entity_guid,
		$name,
		$value,
		$value_type = `''`,
		$owner_guid = `0`,
		$access_id = `ACCESS_PRIVATE`,
		$allow_multiple = `false`
	)

Create a new metadata object, or update an existing one.

Metadata can be an array by setting allow_multiple to true, but it is an indexed array with no control over the indexing.

Parameters

int	$entity_guid	The entity to attach the metadata to
string	$name	Name of the metadata
string	$value	Value of the metadata
string	$value_type	'text', 'integer', or '' for automatic detection
int	$owner_guid	GUID of entity that owns the metadata. Default is logged in user.
int	$access_id	Default is ACCESS_PRIVATE
bool	$allow_multiple	Allow multiple values for one key. Default is false

Returns: int|false id of metadata or false if failure

Definition at line 69 of file metadata.php.

create_metadata_from_array	(		$entity_guid,
		array	$name_and_values,
			$value_type,
			$owner_guid,
			$access_id = `ACCESS_PRIVATE`,
			$allow_multiple = `false`
	)

This function creates metadata from an associative array of "key => value" pairs.

To achieve an array for a single key, pass in the same key multiple times with allow_multiple set to true. This creates an indexed array. It does not support associative arrays and there is no guarantee on the ordering in the array.

Parameters

int	$entity_guid	The entity to attach the metadata to
array	$name_and_values	Associative array - a value can be a string, number, bool
string	$value_type	'text', 'integer', or '' for automatic detection
int	$owner_guid	GUID of entity that owns the metadata
int	$access_id	Default is ACCESS_PRIVATE
bool	$allow_multiple	Allow multiple values for one key. Default is false

Returns: bool

Definition at line 239 of file metadata.php.

elgg_delete_metadata ( array $options )

Deletes metadata based on $options.

Warning: Unlike elgg_get_metadata() this will not accept an empty options array! This requires at least one constraint: metadata_owner_guid(s), metadata_name(s), metadata_value(s), or guid(s) must be set.

Parameters

array $options An options array. elgg_get_metadata()

Returns: bool|null true on success, false on failure, null if no metadata to delete.

Since: 1.8.0

Definition at line 306 of file metadata.php.

elgg_delete_metadata_by_id ( $id )

Deletes metadata using its ID.

Parameters

int $id The metadata ID to delete.

Returns: bool

Definition at line 45 of file metadata.php.

elgg_disable_metadata ( array $options )

Disables metadata based on $options.

Warning: Unlike elgg_get_metadata() this will not accept an empty options array!

Parameters

array $options An options array. elgg_get_metadata()

Returns: bool|null true on success, false on failure, null if no metadata disabled.

Since: 1.8.0

Definition at line 329 of file metadata.php.

elgg_enable_metadata ( array $options )

Enables metadata based on $options.

Warning: Unlike elgg_get_metadata() this will not accept an empty options array!; In order to enable metadata, you must first use access_show_hidden_entities().

Parameters

array $options An options array. elgg_get_metadata()

Returns: bool|null true on success, false on failure, null if no metadata enabled.

Since: 1.8.0

Definition at line 356 of file metadata.php.

elgg_get_entities_from_metadata ( array $options = array() )

ElggEntities interfaces.

Returns entities based upon metadata. Also accepts all options available to elgg_get_entities(). Supports the singular option shortcut.

Note: Using metadata_names and metadata_values results in a "names IN (...) AND values IN (...)" clause. This is subtly differently than default multiple metadata_name_value_pairs, which use "(name = value) AND (name = value)" clauses.

When in doubt, use name_value_pairs.

To ask for entities that do not have a metadata value, use a custom where clause like this:

$options['wheres'][] = "NOT EXISTS (
    SELECT 1 FROM {$dbprefix}metadata md
    WHERE md.entity_guid = e.guid
        AND md.name_id = $name_metastring_id
        AND md.value_id = $value_metastring_id)";

Note the metadata name and value has been denormalized in the above example.

See also: elgg_get_entities

Parameters

array

$options

Array in format:

metadata_names => null|ARR metadata names

metadata_values => null|ARR metadata values

metadata_name_value_pairs => null|ARR (
                                    name => 'name',
                                    value => 'value',
                                    'operand' => '=',
                                    'case_sensitive' => true
                                   )
                          Currently if multiple values are sent via
                          an array (value => array('value1', 'value2')
                          the pair's operand will be forced to "IN".
                          If passing "IN" as the operand and a string as the value,
                          the value must be a properly quoted and escaped string.

metadata_name_value_pairs_operator => null|STR The operator to use for combining
                                   (name = value) OPERATOR (name = value); default AND

metadata_case_sensitive => BOOL Overall Case sensitive

order_by_metadata => null|ARR array( 'name' => 'metadata_text1', 'direction' => ASC|DESC, 'as' => text|integer ) Also supports array('name' => 'metadata_text1')

metadata_owner_guids => null|ARR guids for metadata owners

Returns: ElggEntity[]|mixed If count, int. If not count, array. false on errors.

Since: 1.7.0

Definition at line 431 of file metadata.php.

elgg_get_metadata ( array $options = array() )

Returns metadata.

Accepts all elgg_get_entities() options for entity restraints.

See also: elgg_get_entities

Warning: 1.7's find_metadata() didn't support limits and returned all metadata. This function defaults to a limit of 25. There is probably not a reason for you to return all metadata unless you're exporting an entity, have other restraints in place, or are doing something horribly wrong in your code.

Parameters

array $options Array in format:

metadata_names => null|ARR metadata names metadata_values => null|ARR metadata values metadata_ids => null|ARR metadata ids metadata_case_sensitive => BOOL Overall Case sensitive metadata_owner_guids => null|ARR guids for metadata owners metadata_created_time_lower => INT Lower limit for created time. metadata_created_time_upper => INT Upper limit for created time. metadata_calculation => STR Perform the MySQL function on the metadata values returned. The "metadata_calculation" option causes this function to return the result of performing a mathematical calculation on all metadata that match the query instead of returning ElggMetadata objects.

Returns: ElggMetadata[]|mixed

Since: 1.8.0

Definition at line 282 of file metadata.php.

elgg_get_metadata_from_id ( $id )

Get a specific metadata object by its id.

If you want multiple metadata objects, use elgg_get_metadata().

Parameters

int $id The id of the metadata object being retrieved.

Returns: ElggMetadata|false false if not found

Definition at line 35 of file metadata.php.

elgg_list_entities_from_metadata ( $options )

Returns a list of entities filtered by provided metadata.

See also: elgg_get_entities_from_metadata

Parameters

array $options Options array

Returns: array

Since: 1.7.0

Definition at line 468 of file metadata.php.

get_metadata_url ( $id )

Get the URL for this metadata.

By default this links to the export handler in the current view.

Parameters

int $id Metadata ID

Returns: mixed

Definition at line 772 of file metadata.php.

is_metadata_independent	(	$type,
		$subtype
	)

Determines whether entities of a given type and subtype should not change their metadata in line with their parent entity.

Parameters

string	$type	The type - object, user, etc
string	$subtype	The entity subtype

Returns: bool

Definition at line 807 of file metadata.php.

metadata_array_to_values ( $array )

Takes a metadata array (which has all kinds of properties) and turns it into a simple array of strings.

Parameters

array $array Metadata array

Returns: array Array of strings

Definition at line 751 of file metadata.php.

metadata_update	(	$event,
		$object_type,
		$object
	)

When an entity is updated, resets the access ID on all of its child metadata.

Parameters

string	$event	The name of the event
string	$object_type	The type of object
ElggEntity	$object	The entity itself

Returns: true private Set as private in 1.9.0

Definition at line 829 of file metadata.php.

register_metadata_as_independent	(	$type,
		$subtype = `'*'`
	)

Mark entities with a particular type and subtype as having access permissions that can be changed independently from their parent entity.

Parameters

string	$type	The type - object, user, etc
string	$subtype	The subtype; all subtypes by default

Returns: void

Definition at line 790 of file metadata.php.

row_to_elggmetadata ( $row )

Convert a database row to a new ElggMetadata.

Parameters

stdClass $row An object from the database

Returns: stdClass|ElggMetadata private

Definition at line 18 of file metadata.php.

update_metadata	(	$id,
		$name,
		$value,
		$value_type,
		$owner_guid,
		$access_id
	)

Update a specific piece of metadata.

Parameters

int	$id	ID of the metadata to update
string	$name	Metadata name
string	$value	Metadata value
string	$value_type	Value type
int	$owner_guid	Owner guid
int	$access_id	Access ID

Returns: bool

Definition at line 156 of file metadata.php.

Namespaces

Functions

Function Documentation