MediaWiki\HookContainer\HookContainer Class Reference

HookContainer class. More...

Inherits SalvageableService.

Collaboration diagram for MediaWiki\HookContainer\HookContainer:

Public Member Functions
	__construct (HookRegistry $hookRegistry, ObjectFactory $objectFactory)
	clear (string $hook)
	Clear handlers of the given hook.
	emitDeprecationWarnings ()
	For each hook handler of each hook, this will log a deprecation if:
	getHandlerCallbacks (string $hook)
	Get handler callbacks.
	getHandlerDescriptions (string $hook)
	Return the array of strings that describe the handler registered with the given hook.
	getHookNames ()
	Returns the names of all hooks that have at least one handler registered.
	isRegistered (string $hook)
	Return whether hook has any handlers registered to it.
	register (string $hook, $handler)
	Attach an event handler to a given hook.
	run (string $hook, array $args=[], array $options=[])
	Call registered hook functions through either the legacy $wgHooks or extension.json.
	salvage (SalvageableService $other)
	Salvage the state of HookContainer by retaining existing handler objects and hooks registered via HookContainer::register().
	scopedRegister (string $hook, $handler)
	Register hook and handler, allowing for easy removal.

Public Attributes
const	NOOP = '*no-op*'

Detailed Description

HookContainer class.

Main class for managing hooks

Since

1.35

Definition at line 57 of file HookContainer.php.

Constructor & Destructor Documentation

__construct()

MediaWiki\HookContainer\HookContainer::__construct	(	HookRegistry	$hookRegistry,
		ObjectFactory	$objectFactory )

Definition at line 89 of file HookContainer.php.

Member Function Documentation

clear()

MediaWiki\HookContainer\HookContainer::clear

(

string

$hook

)

Clear handlers of the given hook.

This is intended for use while testing and will fail if MW_PHPUNIT_TEST is not defined.

Parameters

string

$hook

Name of hook to clear

Access: internal

For testing only

Definition at line 185 of file HookContainer.php.

emitDeprecationWarnings()

MediaWiki\HookContainer\HookContainer::emitDeprecationWarnings

(

)

For each hook handler of each hook, this will log a deprecation if:

1. the hook is marked deprecated and
2. the "silent" flag is absent or false, and
3. an extension registers a handler in the new way but does not acknowledge deprecation

Definition at line 606 of file HookContainer.php.

getHandlerCallbacks()

MediaWiki\HookContainer\HookContainer::getHandlerCallbacks

(

string

$hook

)

Get handler callbacks.

Deprecated

since 1.41.

Access: internal

For use by FauxHookHandlerArray. Delete when no longer needed.

Parameters

string

$hook

Name of hook

Returns

callable[]

Definition at line 461 of file HookContainer.php.

getHandlerDescriptions()

MediaWiki\HookContainer\HookContainer::getHandlerDescriptions

(

string

$hook

)

Return the array of strings that describe the handler registered with the given hook.

Access: internal

Only public for use by ApiQuerySiteInfo.php and SpecialVersion.php

Parameters

string

$hook

Name of the hook

Returns

string[] A list of handler descriptions

Definition at line 543 of file HookContainer.php.

getHookNames()

MediaWiki\HookContainer\HookContainer::getHookNames

(

)

Returns the names of all hooks that have at least one handler registered.

Returns

string[]

Definition at line 488 of file HookContainer.php.

isRegistered()

MediaWiki\HookContainer\HookContainer::isRegistered

(

string

$hook

)

Return whether hook has any handlers registered to it.

The function may have been registered via Hooks::register or in extension.json

Parameters

string

$hook

Name of hook

Returns

bool Whether the hook has a handler registered to it

Definition at line 401 of file HookContainer.php.

register()

MediaWiki\HookContainer\HookContainer::register	(	string	$hook,
			$handler )

Attach an event handler to a given hook.

The handler should be given in one of the following forms:

1) A callable (string, array, or closure) 2) An extension hook handler spec in the form returned by HookRegistry::getExtensionHooks

Several other forms are supported for backwards compatibility, but should not be used when calling this method directly.

Note

This method accepts "broken callables", that is, callable structures that reference classes that could not be found or could not be loaded, e.g. because they implement an interface that cannot be loaded. This situation may legitimately arise when implementing hooks defined by extensions that are not present. In that case, the hook will never fire and registering the "broken" handlers is harmless. If a broken hook handler is registered for a hook that is indeed called, it will cause an error. This is intentional: we don't want to silently ignore mistakes like mistyped class names in a hook handler registration.

Parameters

string	$hook	Name of hook
string | array | callable	$handler	handler

Definition at line 431 of file HookContainer.php.

run()

MediaWiki\HookContainer\HookContainer::run	(	string	$hook,
		array	$args = [],
		array	$options = [] )

Call registered hook functions through either the legacy $wgHooks or extension.json.

For the given hook, fetch the array of handler objects and process them. Determine the proper callback for each hook and then call the actual hook using the appropriate arguments. Finally, process the return value and return/throw accordingly.

Parameters

string	$hook	Name of the hook
array	$args	Arguments to pass to hook handler
array	$options	options map: abortable: (bool) If false, handlers will not be allowed to abort the call sequence. An exception will be raised if a handler returns anything other than true or null. deprecatedVersion: (string) Version of MediaWiki this hook was deprecated in. For supporting Hooks::run() legacy $deprecatedVersion parameter. New core code should add deprecated hooks to the DeprecatedHooks::$deprecatedHooks array literal. New extension code should use the DeprecatedHooks attribute. silent: (bool) If true, do not raise a deprecation warning noServices: (bool) If true, do not allow hook handlers with service dependencies

Returns

bool True if no handler aborted the hook

Exceptions

UnexpectedValueException

if handlers return an invalid value

Definition at line 138 of file HookContainer.php.

salvage()

MediaWiki\HookContainer\HookContainer::salvage

(

SalvageableService

$other

)

Salvage the state of HookContainer by retaining existing handler objects and hooks registered via HookContainer::register().

Necessary in the event that MediaWikiServices::resetGlobalInstance() is called after hooks have already been registered.

Parameters

HookContainer | SalvageableService

$other

The object to salvage state from. $other be of type HookContainer

Definition at line 106 of file HookContainer.php.

scopedRegister()

MediaWiki\HookContainer\HookContainer::scopedRegister	(	string	$hook,
			$handler )

Register hook and handler, allowing for easy removal.

Intended for use in temporary registration e.g. testing

Parameters

string	$hook	Name of hook
callable | string | array	$handler	Handler to attach

Returns

ScopedCallback

Definition at line 201 of file HookContainer.php.

Member Data Documentation

NOOP

const MediaWiki\HookContainer\HookContainer::NOOP = '*no-op*'

Definition at line 60 of file HookContainer.php.

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

• includes/HookContainer/HookContainer.php