Help
in package
implements
ActionInterface
Uses
BackwardCompatibility
This class has the important job of taking care of help messages and the help center.
Table of Contents
Interfaces
- ActionInterface
- Interface for all action classes.
Properties
- $subaction : string
- $subactions : array<string|int, mixed>
- $obj : object
- $backcompat : array<string|int, mixed>
Methods
- call() : void
- Convenience method to load() and execute() an instance of this class.
- execute() : void
- Dispatcher to whichever sub-action method is necessary.
- exportStatic() : void
- Provides a way to export a class's public static properties and methods to global namespace.
- HelpIndex() : void
- Backward compatibility wrapper for the index sub-action.
- index() : mixed
- The main page for the Help section
- load() : object
- Static wrapper for constructor.
- __construct() : mixed
- Constructor. Protected to force instantiation via self::load().
Properties
$subaction
public
string
$subaction
= 'index'
The requested sub-action. This should be set by the constructor.
$subactions
public
static array<string|int, mixed>
$subactions
= ['index' => 'index']
Available sub-actions.
$obj
protected
static object
$obj
An instance of this class. This is used by the load() method to prevent mulitple instantiations.
$backcompat
private
static array<string|int, mixed>
$backcompat
= ['func_names' => ['call' => 'ShowHelp', 'HelpIndex' => 'HelpIndex']]
BackwardCompatibility settings for this class.
Methods
call()
Convenience method to load() and execute() an instance of this class.
public
static call() : void
execute()
Dispatcher to whichever sub-action method is necessary.
public
execute() : void
exportStatic()
Provides a way to export a class's public static properties and methods to global namespace.
public
static exportStatic() : void
To do so:
- Use this trait in the class.
- At the END of the class's file, call its exportStatic() method.
Although it might not seem that way at first glance, this approach conforms to section 2.3 of PSR 1, since executing this method is simply a dynamic means of declaring functions when the file is included; it has no other side effects.
Regarding the $backcompat items:
A class's static properties are not exported to global variables unless explicitly included in $backcompat['prop_names']. Likewise, a class's static methods are not exported as global functions unless explicitly included in $backcompat['func_names'].
$backcompat['prop_names'] is a simple array where the keys are the names of one or more of a class's static properties, and the values are the names of global variables. In each case, the global variable will be set to a reference to the static property. Static properties that are not named in this array will not be exported.
$backcompat['func_names'] is a simple array where the keys are the names of one or more of a class's static methods, and the values are the names that should be used for global functions that will encapsulate those methods. Methods that are not named in this array will not be exported.
Adding non-static properties or methods to the $backcompat arrays will produce runtime errors. It is the responsibility of the developer to make sure not to do this.
HelpIndex()
Backward compatibility wrapper for the index sub-action.
public
static HelpIndex() : void
index()
The main page for the Help section
public
index() : mixed
load()
Static wrapper for constructor.
public
static load() : object
Return values
object —An instance of this class.
__construct()
Constructor. Protected to force instantiation via self::load().
protected
__construct() : mixed
Redirect to the user help ;). It loads information needed for the help section. It is accessed by ?action=help.
Uses Help template and Manual language file.