Events service. More...

Public Member Functions
	__construct (protected HandlersService $handlers)
	Constructor. More...

	trigger (string $name, string $type, $object=null, array $options=[])
	Triggers an Elgg event. More...

	triggerResults (string $name, string $type, array $params=[], $value=null, array $options=[])
	Triggers a event that is allowed to return a mixed result. More...

	triggerBefore (string $name, string $type, $object=null, array $options=[])
	Trigger a "Before event" indicating a process is about to begin. More...

	triggerAfter (string $name, string $type, $object=null, array $options=[])
	Trigger an "After event" indicating a process has finished. More...

	triggerSequence (string $name, string $type, $object=null, callable $callable=null, array $options=[])
	Trigger a sequence of <event>:before, <event>, and <event>:after handlers. More...

	triggerResultsSequence (string $name, string $type, array $params=[], $value=null, callable $callable=null, array $options=[])
	Trigger an sequence of <event>:before, <event>, and <event>:after handlers. More...

	triggerDeprecated (string $name, string $type, $object=null, string $message= '', string $version= '', array $options=[])
	Trigger an event sequence normally, but send a notice about deprecated use if any handlers are registered. More...

	triggerDeprecatedResults (string $name, string $type, array $params=[], $returnvalue=null, string $message= '', string $version= '', array $options=[])
	Trigger an event sequence normally, but send a notice about deprecated use if any handlers are registered. More...

	registerHandler (string $name, string $type, $callback, int $priority=500)
	Register a callback as a event handler. More...

	unregisterHandler (string $name, string $type, $callback)
	Unregister a callback as an event handler. More...

	clearHandlers (string $name, string $type)
	Clears all callback registrations for an event. More...

	getAllHandlers ()
	Returns all registered handlers as array( $name => array( $type => array( $priority => array( callback, callback, ) ) ) More...

	hasHandler (string $name, string $type)
	Is a handler registered for this specific name and type? "all" handlers are not considered. More...

	getOrderedHandlers (string $name, string $type)
	Returns an ordered array of handlers registered for $name and $type. More...

	backup ()
	Temporarily remove all event registrations (before tests) More...

	restore ()
	Restore backed up event registrations (after tests) More...

Public Attributes
const	REG_KEY_PRIORITY = 0

const	REG_KEY_INDEX = 1

const	REG_KEY_HANDLER = 2

const	OPTION_STOPPABLE = 'stoppable'

const	OPTION_USE_TIMER = 'use_timer'

const	OPTION_TIMER_KEYS = 'timer_keys'

const	OPTION_BEGIN_CALLBACK = 'begin_callback'

const	OPTION_END_CALLBACK = 'end_callback'

Protected Member Functions
	getMatcher ($spec)
	Create a matcher for the given callable (if it's for a static or dynamic method) More...

	checkDeprecation (string $name, string $type, string $message, string $version)
	Check if handlers are registered on a deprecated event. More...

	callHandler ($callable, $event, array $args, array $options=[])

Protected Attributes
int	$next_index = 0

array	$ordered_handlers_cache = []

array	$registrations = []

array	$backups = []

Detailed Description

Events service.

Use elgg()->events

Definition at line 15 of file EventsService.php.

Constructor & Destructor Documentation

Elgg\EventsService::__construct ( protected HandlersService $handlers )

Constructor.

Parameters

HandlersService $handlers Handlers

Definition at line 46 of file EventsService.php.

Member Function Documentation

Elgg\EventsService::backup ( )

Temporarily remove all event registrations (before tests)

Call backup() before your tests and restore() after.

Note: This behaves like a stack. You must call restore() for each backup() call.

Returns: void

Definition at line 521 of file EventsService.php.

Elgg\EventsService::callHandler	(		$callable,
			$event,
		array	$args,
		array	$options = `[]`
	)

protected

Parameters

callable	$callable	Callable
mixed	$event	Event object
array	$args	Event arguments
array	$options	(internal) options for triggering the event

Returns: array [success, result, object]

Definition at line 572 of file EventsService.php.

Elgg\EventsService::checkDeprecation	(	string	$name,
		string	$type,
		string	$message,
		string	$version
	)

protected

Check if handlers are registered on a deprecated event.

If so Display a message

Parameters

string	$name	the name of the event
string	$type	the type of the event
string	$message	The deprecation message
string	$version	Human-readable release version: 1.9, 1.10, ...

Returns: void

Definition at line 551 of file EventsService.php.

Elgg\EventsService::clearHandlers	(	string	$name,
		string	$type
	)

Clears all callback registrations for an event.

Parameters

string	$name	The name of the event
string	$type	The type of the event

Returns: void

Definition at line 388 of file EventsService.php.

Elgg\EventsService::getAllHandlers ( )

Returns all registered handlers as array( $name => array( $type => array( $priority => array( callback, callback, ) ) )

Returns: array

Definition at line 407 of file EventsService.php.

Elgg\EventsService::getMatcher ( $spec )

protected

Create a matcher for the given callable (if it's for a static or dynamic method)

Parameters

callable $spec Callable we're creating a matcher for

Returns: MethodMatcher|null

Definition at line 491 of file EventsService.php.

Elgg\EventsService::getOrderedHandlers	(	string	$name,
		string	$type
	)

Returns an ordered array of handlers registered for $name and $type.

Parameters

string	$name	The name of the event
string	$type	The type of the event

Returns: callable[]

Definition at line 443 of file EventsService.php.

Elgg\EventsService::hasHandler	(	string	$name,
		string	$type
	)

Is a handler registered for this specific name and type? "all" handlers are not considered.

If you need to consider "all" handlers, you must check them independently, or use (bool) elgg()->events->getOrderedHandlers().

Parameters

string	$name	The name of the event
string	$type	The type of the event

Returns: boolean

Definition at line 431 of file EventsService.php.

Elgg\EventsService::registerHandler	(	string	$name,
		string	$type,
			$callback,
		int	$priority = `500`
	)

Register a callback as a event handler.

Parameters

string	$name	The name of the event
string	$type	The type of the event
callable	$callback	The name of a valid function or an array with object and method
int	$priority	The priority - 500 is default, lower numbers called first

Returns: bool

Warning: This doesn't check if a callback is valid to be called, only if it is in the correct format as a callable.

Definition at line 324 of file EventsService.php.

Elgg\EventsService::restore ( )

Restore backed up event registrations (after tests)

Returns: void

Definition at line 532 of file EventsService.php.

Elgg\EventsService::trigger	(	string	$name,
		string	$type,
			$object = `null`,
		array	$options = `[]`
	)

Triggers an Elgg event.

Parameters

string	$name	The event name
string	$type	The event type
mixed	$object	The object involved in the event
array	$options	(internal) options for triggering the event

See also: elgg_trigger_event(); elgg_trigger_after_event(); elgg_trigger_before_event()

Returns: bool

Definition at line 63 of file EventsService.php.

Elgg\EventsService::triggerAfter	(	string	$name,
		string	$type,
			$object = `null`,
		array	$options = `[]`
	)

Trigger an "After event" indicating a process has finished.

Unlike regular events, all the handlers will be called, their return values ignored.

To register for an after event, append ":after" to the event name when registering.

Parameters

string	$name	The event name. The fired event type will be appended with ":after".
string	$type	The event type
mixed	$object	The object involved in the event
array	$options	(internal) options for triggering the event

Returns: void

See also: EventsService::trigger(); EventsService::triggerBefore()

Since: 2.0.0

Definition at line 184 of file EventsService.php.

Elgg\EventsService::triggerBefore	(	string	$name,
		string	$type,
			$object = `null`,
		array	$options = `[]`
	)

Trigger a "Before event" indicating a process is about to begin.

Like regular events, a handler returning false will cancel the process and false will be returned.

To register for a before event, append ":before" to the event name when registering.

Parameters

string	$name	The event type. The fired event type will be appended with ":before".
string	$type	The object type
mixed	$object	The object involved in the event
array	$options	(internal) options for triggering the event

Returns: bool False if any handler returned false, otherwise true

See also: EventsService::trigger(); EventsService::triggerAfter()

Since: 2.0.0

Definition at line 162 of file EventsService.php.

Elgg\EventsService::triggerDeprecated	(	string	$name,
		string	$type,
			$object = `null`,
		string	$message = `''`,
		string	$version = `''`,
		array	$options = `[]`
	)

Trigger an event sequence normally, but send a notice about deprecated use if any handlers are registered.

Parameters

string	$name	The event name
string	$type	The event type
mixed	$object	The object involved in the event
string	$message	The deprecation message
string	$version	Human-readable release version: 1.9, 1.10, ...
array	$options	(internal) options for triggering the event

Returns: bool

See also: elgg_trigger_deprecated_event()

Definition at line 282 of file EventsService.php.

Elgg\EventsService::triggerDeprecatedResults	(	string	$name,
		string	$type,
		array	$params = `[]`,
			$returnvalue = `null`,
		string	$message = `''`,
		string	$version = `''`,
		array	$options = `[]`
	)

Trigger an event sequence normally, but send a notice about deprecated use if any handlers are registered.

Parameters

string	$name	The event name
string	$type	The event type
array	$params	The parameters related to the event
mixed	$returnvalue	The return value
string	$message	The deprecation message
string	$version	Human-readable release version: 1.9, 1.10, ...
array	$options	(internal) options for triggering the event

Returns: mixed

See also: elgg_trigger_deprecated_event_results()

Definition at line 304 of file EventsService.php.

Elgg\EventsService::triggerResults	(	string	$name,
		string	$type,
		array	$params = `[]`,
			$value = `null`,
		array	$options = `[]`
	)

Triggers a event that is allowed to return a mixed result.

Parameters

string	$name	The name of the event
string	$type	The type of the event
mixed	$params	Supplied params for the event
mixed	$value	The value of the event, this can be altered by registered callbacks
array	$options	(internal) options for triggering the event

Returns: mixed

See also: elgg_trigger_event_results()

Definition at line 119 of file EventsService.php.

Elgg\EventsService::triggerResultsSequence	(	string	$name,
		string	$type,
		array	$params = `[]`,
			$value = `null`,
		callable	$callable = `null`,
		array	$options = `[]`
	)

Trigger an sequence of <event>:before, <event>, and <event>:after handlers.

Allows <event>:before to terminate the sequence by returning false from a handler Allows running a callable on successful <event> before <event>:after is triggered

Parameters

string	$name	The event name
string	$type	The event type
mixed	$params	Supplied params for the event
mixed	$value	The value of the event, this can be altered by registered callbacks
callable	$callable	Callable to run on successful event, before event:after
array	$options	(internal) options for triggering the event

Returns: mixed

Definition at line 242 of file EventsService.php.

Elgg\EventsService::triggerSequence	(	string	$name,
		string	$type,
			$object = `null`,
		callable	$callable = `null`,
		array	$options = `[]`
	)

Trigger a sequence of <event>:before, <event>, and <event>:after handlers.

Allows <event>:before to terminate the sequence by returning false from a handler Allows running a callable on successful <event> before <event>:after is triggered Returns the result of the callable or bool

Parameters

string	$name	The event name
string	$type	The event type
mixed	$object	The object involved in the event
callable	$callable	Callable to run on successful event, before event:after
array	$options	(internal) options for triggering the event

Returns: bool

Definition at line 204 of file EventsService.php.

Elgg\EventsService::unregisterHandler	(	string	$name,
		string	$type,
			$callback
	)

Unregister a callback as an event handler.

Parameters

string	$name	The name of the event
string	$type	The name of the type of entity (eg "user", "object" etc)
callable	$callback	The PHP callback to be removed. Since 1.11, static method callbacks will match dynamic methods

Returns: void

Definition at line 357 of file EventsService.php.

Member Data Documentation

array Elgg\EventsService::$backups = []

protected

Definition at line 39 of file EventsService.php.

int Elgg\EventsService::$next_index = 0

protected

Definition at line 30 of file EventsService.php.

array Elgg\EventsService::$ordered_handlers_cache = []

protected

Definition at line 32 of file EventsService.php.

array Elgg\EventsService::$registrations = []

protected

Definition at line 37 of file EventsService.php.

const Elgg\EventsService::OPTION_BEGIN_CALLBACK = 'begin_callback'

Definition at line 27 of file EventsService.php.

const Elgg\EventsService::OPTION_END_CALLBACK = 'end_callback'

Definition at line 28 of file EventsService.php.

const Elgg\EventsService::OPTION_STOPPABLE = 'stoppable'

Definition at line 24 of file EventsService.php.

const Elgg\EventsService::OPTION_TIMER_KEYS = 'timer_keys'

Definition at line 26 of file EventsService.php.

const Elgg\EventsService::OPTION_USE_TIMER = 'use_timer'

Definition at line 25 of file EventsService.php.

const Elgg\EventsService::REG_KEY_HANDLER = 2

Definition at line 22 of file EventsService.php.

const Elgg\EventsService::REG_KEY_INDEX = 1

Definition at line 21 of file EventsService.php.

const Elgg\EventsService::REG_KEY_PRIORITY = 0

Definition at line 20 of file EventsService.php.

The documentation for this class was generated from the following file:

engine/classes/Elgg/EventsService.php

Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation