context_system Class Reference

Inheritance diagram for context_system:

Public Member Functions
	__get ($name)
	Magic method getter, redirects to read only values. More...
	__isset ($name)
	Full support for isset on our magic read only properties. More...
	__set ($name, $value)
	Magic setter method, we do not want anybody to modify properties from the outside. More...
	__unset ($name)
	All properties are read only, sorry. More...
	delete ()
	Delete the context content and the context record itself.
	delete_capabilities ()
	Unassign all capabilities from a context.
	delete_content ()
	Delete all data linked to content, do not delete the context record itself.
	get_capabilities (string $sort=self::DEFAULT_CAPABILITY_SORT)
	Returns array of relevant context capability records. More...
	get_child_contexts ()
	Returns all site contexts except the system context, DO NOT call on production servers!! More...
	get_context_name ($withprefix=true, $short=false, $escape=true)
	Returns human readable context identifier. More...
	get_course_context ($strict=true)
	Is this context part of any course? If yes return course context. More...
	get_parent_context ()
	Returns parent context. More...
	get_parent_context_ids ($includeself=false)
	Returns parent context ids of this context in reversed order, i.e. More...
	get_parent_context_paths ($includeself=false)
	Returns parent context paths of this context. More...
	get_parent_contexts ($includeself=false)
	Returns parent contexts of this context in reversed order, i.e. More...
	get_url ()
	Returns the most relevant URL for this context. More...
	getIterator ()
	Create an iterator because magic vars can't be seen by 'foreach'. More...
	is_child_of (context $possibleparent, bool $includeself)
	Determine if the current context is a child of the possible parent. More...
	is_locked ()
	Whether the current context is locked. More...
	is_parent_of (context $possiblechild, bool $includeself)
	Determine if the current context is a parent of the possible child. More...
	mark_dirty ()
	Mark a context as dirty (with timestamp) so as to force reloading of the context.
	reload_if_dirty ()
	Reset all cached permissions and definitions if the necessary. More...
	reset_paths ($rebuild=true)
	Remove all context path info and optionally rebuild it. More...
	set_locked (bool $locked)
	Set whether this context has been locked or not. More...
	update_moved (context $newparent)
	Update context info after moving context in the tree structure. More...

Static Public Member Functions
static	get_level_name ()
	Returns human readable context level name. More...
static	instance ($instanceid=0, $strictness=MUST_EXIST, $cache=true)
	Returns system context instance. More...
static	instance_by_id ($id, $strictness=MUST_EXIST)
	Get a context instance as an object, from a given context id. More...

Protected Member Functions
	__construct (stdClass $record)
	Please use context_system::instance() if you need the instance of context. More...

Static Protected Member Functions
static	build_paths ($force)
	Rebuild context paths and depths at system context level. More...
static	cache_add (context $context)
	Adds a context to the cache. More...
static	cache_get ($contextlevel, $instance)
	Gets a context from the cache. More...
static	cache_get_by_id ($id)
	Gets a context from the cache based on its id. More...
static	cache_remove (context $context)
	Removes a context from the cache. More...
static	create_instance_from_record (stdClass $record)
	This function is also used to work around 'protected' keyword problems in context_helper. More...
static	create_level_instances ()
	Create missing context instances at system context. More...
static	get_cleanup_sql ()
	Returns sql necessary for purging of stale context instances. More...
static	insert_context_record ($contextlevel, $instanceid, $parentpath)
	Utility method for context creation. More...
static	merge_context_temp_table ()
	Copy prepared new contexts from temp table to context table, we do this in db specific way for perf reasons only.
static	preload_from_record (stdClass $rec)
	Preloads context information from db record and strips the cached info. More...
static	reset_caches ()
	Resets the cache to remove all data. More...

Protected Attributes
int	$_contextlevel
	The context level Can be accessed publicly through $context->contextlevel One of CONTEXT_* e.g. More...
int	$_depth
	The depth of the context in relation to parent contexts Can be accessed publicly through $context->depth.
int	$_id
	The context id Can be accessed publicly through $context->id.
int	$_instanceid
	Id of the item this context is related to e.g. More...
int	$_locked
	Whether this context is locked or not. More...
string	$_path
	The path to the context always starting from the system context Can be accessed publicly through $context->path.
string const	DEFAULT_CAPABILITY_SORT = 'contextlevel, component, name'
	Default sorting of capabilities in {. More...

Static Protected Attributes
static int	$cache_count = 0
	Context count Why do we do count contexts? Because count($array) is horribly slow for large arrays.
static array	$cache_preloaded = array()
	Context caching info.
static context_system	$systemcontext = null
	The system context once initialised.

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

• lib/accesslib.php