View

The View class is used to render views in the Hazaar framework.

Properties

app

The application object.

public Application $app

data

Data that is accessible from the view.

protected array $data

helpers

View Helpers.

protected array $helpers

functionHandlers

Array of function handlers. These can be either closures or objects that provide public methods.

protected array $functionHandlers

functions

Array of functions that can be called from the view.

protected array $functions

viewFile

public string $viewFile

Methods

__construct

Constructs a new View instance.

public __construct(View $view, array $viewData): void

Parameters

Parameter	Type	Description
$view	View	the view to load, either as a string (view name/path) or an existing View instance
$viewData	array	optional associative array of data to be passed to the view

__get

Magic getter to retrieve a helper instance by name.

public __get(string $helper): ?Helper

Parameters

Parameter	Type	Description
$helper	string	the name of the helper to retrieve

__set

Magic setter method to assign a value to a property.

public __set(string $key, mixed $value): void

This method is triggered when writing data to inaccessible or non-existing properties. It delegates the assignment to the set() method.

Parameters

Parameter	Type	Description
$key	string	The name of the view data
$value	mixed	The value to set on the view data. Can be anything including strings, integers, arrays or objects.

__isset

Checks if a given key is set in the view.

public __isset(string $key): bool

This magic method is triggered by calling isset() or empty() on inaccessible properties. It delegates the check to the has() method to determine if the specified key exists.

Parameters

Parameter	Type	Description
$key	string	The name of the view data to look for

__unset

Magic method to unset a variable from the view.

public __unset(string $key): void

This method is triggered when the unset() function is used on an object property. It removes the specified key from the view's data storage.

Parameters

Parameter	Type	Description
$key	string	the name of the variable to unset

__call

Magic method to call a function from the view.

public __call(string $method, array $args): mixed

This method will call a function from the view. The function must be registered with the view using the registerFunction or registerFunctionHandler methods.

Parameters

Parameter	Type	Description
$method	string	The name of the method to call
$args	array	The arguments to pass to the method

getViewPath

Returns the path to a view file.

public getViewPath(string $view, string $name): ?string

This method will search for a view file in the application view path and the support view path.

Parameters

Parameter	Type	Description
$view	string	the name of the view to find
$name	string	the name of the view that was found

load

Load a view file.

public load(string $view): void

This method will load a view file from disk. The view file can be either a PHP file or a Smarty template file.

Parameters

Parameter	Type	Description
$view	string	the name of the view to load

getViewFile

Retrieves the path to the view file associated with this instance.

public getViewFile(): string

get

Helper/data accessor method.

public get(string $key, mixed $default): void

This will return a helper, if one exists with the name provided. Otherwise it will return any view data stored with the name.

Parameters

Parameter	Type	Description
$key	string	the name of the helper or view data key
$default	mixed	if neither a helper or view data is found this default value will be returned

set

Set view data value by key.

public set(string $key, mixed $value): void

Parameters

Parameter	Type	Description
$key	string	The name of the view data
$value	mixed	The value to set on the view data. Can be anything including strings, integers, arrays or objects.

has

Tests if view data is set with the provided key.

public has(string $key): bool

Parameters

Parameter	Type	Description
$key	string	The name of the view data to look for

remove

Removes a value from the view data array by its key.

public remove(string $key): void

Parameters

Parameter	Type	Description
$key	string	the key of the data item to remove

populate

Populates the view data with the provided array.

public populate(array $array): void

Parameters

Parameter	Type	Description
$array	array	the data to populate the view with

extend

Merges the given array into the current view data.

public extend(array $array): void

This method extends the existing data array by merging it with the provided array. If there are duplicate keys, the values from the provided array will overwrite the existing ones.

Parameters

Parameter	Type	Description
$array	array	the array of data to merge into the view

getData

Retrieves the data stored in the view.

public getData(): void

setHelpers

Sets the helpers for the view.

public setHelpers(array $helpers): void

This method replaces the current helpers with the provided array of helpers. Each helper should be an instance of the Helper class or its subclasses.

Parameters

Parameter	Type	Description
$helpers	array	an associative array of helpers to be set

addHelper

Adds a view helper by name, searching through predefined namespaces.

public addHelper(string $name,  $args): ?Helper

This method attempts to locate and register a view helper class by searching through a list of namespace prefixes. The application's helper namespace is checked first, allowing for overrides of built-in helpers.

Parameters

Parameter	Type	Description
$name	string	the name of the helper to add
$args	``````

getHelper

Retrieves a helper instance by name.

public getHelper(string $name): ?Helper

If the helper with the specified name already exists in the helpers array, it is returned. Otherwise, the helper is added using the addHelper method and then returned.

Parameters

Parameter	Type	Description
$name	string	the name of the helper to retrieve

render

Renders the view file and returns the output as a string.

public render(?array $data): string

If the view file has a 'tpl' extension, it uses the Smarty template engine to render the view, registering any custom functions and function handlers. Otherwise, it includes the view file directly and captures its output.

Parameters

Parameter	Type	Description
$data	array	optional data to be merged with the view's data for rendering

offsetExists

Checks if the specified offset exists in the data array.

public offsetExists(mixed $offset): bool

This method is typically used to determine if a given key is set in the internal data storage.

Parameters

Parameter	Type	Description
$offset	mixed	the offset to check for existence

offsetGet

Retrieves the value associated with the specified offset from the internal data array.

public offsetGet(mixed $offset): mixed

This method allows objects of this class to be accessed using array syntax.

Parameters

Parameter	Type	Description
$offset	mixed	the offset to retrieve

offsetSet

Sets a value in the internal data array at the specified offset.

public offsetSet(mixed $offset, mixed $value): void

If the offset is null, the value is appended to the array. Otherwise, the value is set at the given offset.

Parameters

Parameter	Type	Description
$offset	mixed	The offset to assign the value to. If null, value is appended.
$value	mixed	the value to set

offsetUnset

Unsets the value at the specified offset in the data array.

public offsetUnset(mixed $offset): void

This method is typically used to remove a value from the internal data storage by its key, implementing the ArrayAccess interface.

Parameters

Parameter	Type	Description
$offset	mixed	the key of the value to unset

registerFunctionHandler

Register a function handler.

public registerFunctionHandler(mixed $handler): void

Function handlers are used to handle custom functions in the view template. Unlike custom functions, function handlers are objects that provide public methods that can be called from the view template.

Smarty:

{$functionName param1="value" param2="value"}

PHP:

<?php $this->functionName('param1') ?>

The function will be called with the parameters as an array. The function must return a string which will be inserted into the view at the point the function was called.

Parameters

Parameter	Type	Description
$handler	mixed	The function handler object to register

registerFunction

Register a custom function with the view.

public registerFunction(string $name, callable $function): void

Custom functions are functions that can be called from within the view. The function can be called using the syntax:

Smarty:

{$functionName param1="value" param2="value"}

PHP:

<?php $this->functionName('param1') ?>

The function will be called with the parameters as an array. The function must return a string which will be inserted into the view at the point the function was called.

Parameters

Parameter	Type	Description
$name	string	The name of the function to register
$function	callable	The function to call when the function is called in the view

setFunctionHandlers

Sets the function handlers, overwriting any existing handlers.

public setFunctionHandlers(array $handlers): void

Parameters

Parameter	Type	Description
$handlers	array

setFunctions

Sets the functions, overwriting any existing functions.

public setFunctions(array $functions): void

Parameters

Parameter	Type	Description
$functions	array	The functions to set

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