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C CakePHP 2.4 API

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Classes

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Class Helper

Abstract base class for all other Helpers in CakePHP. Provides common methods and features.

Object
Extended by Helper
Direct Subclasses
  • InterceptContentHelper
Package: Cake\View
Copyright: Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
License: MIT License
Location: Cake/View/Helper.php

Properties summary

  • $_View protected
    View
    The View instance this helper is attached to
  • $_association protected
    string
    The name of the current model association entities are in scope of.
  • $_attributeFormat protected
    string
    Format to attribute
  • $_cleaned protected
    mixed
    Holds the cleaned content.
  • $_entityPath protected
    string
    The dot separated list of elements the current field entity is for.
  • $_fieldSuffixes protected
    array

    A list of strings that should be treated as suffixes, or sub inputs for a parent input. This is used for date/time inputs primarily.

  • $_helperMap protected
    array
    A helper lookup table used to lazy load helper objects.
  • $_minimizedAttributeFormat protected
    string
    Format to attribute
  • $_minimizedAttributes protected
    array
    Minimized attributes
  • $_modelScope protected
    string
    The name of the current model entities are in scope of.
  • $_tainted protected
    mixed
    Holds the content to be cleaned.
  • $fieldset public
    array

    Holds the fields array('field_name' => array('type' => 'string', 'length' => 100), primaryKey and validates array('field_name')

  • $helpers public
    array
    List of helpers used by this helper
  • $plugin public
    string
    Plugin path
  • $request public
    CakeRequest
    Request object
  • $settings public
    array
    Settings for this helper.
  • $tags public
    array
    Holds tag templates.
  • $theme public
    string
    The current theme name if any.

Method Summary

  • __call() public
    Provide non fatal errors on missing method calls.
  • __construct() public
    Default Constructor
  • __get() public deprecated
    Lazy loads helpers. Provides access to deprecated request properties as well.
  • __set() public deprecated
    Provides backwards compatibility access for setting values to the request object.
  • _clean() protected
    Removes harmful content from output
  • _confirm() protected
    Returns a string to be used as onclick handler for confirm dialogs.
  • _encodeUrl() protected
    Encodes a URL for use in HTML attributes.
  • _formatAttribute() protected deprecated

    Formats an individual attribute, and returns the string value of the composed attribute. Works with minimized attributes that have the same value as their name such as 'disabled' and 'checked'

  • _initInputField() protected

    Sets the defaults for an input tag. Will set the name, value, and id attributes for an array of html attributes.

  • _name() protected

    Gets the input field name for the current tag. Creates input name attributes using CakePHP's data[Model][field] formatting.

  • _parseAttributes() protected deprecated

    Returns a space-delimited string with items of the $options array. If a key of $options array happens to be one of those listed in Helper::$_minimizedAttributes

  • _reset() protected
    Resets the vars used by Helper::clean() to null
  • _selectedArray() protected

    Transforms a recordset from a hasAndBelongsToMany association to a list of selected options for a multiple select element

  • addClass() public
    Adds the given class to the element options
  • afterLayout() public
    After layout callback. afterLayout is called after the layout has rendered.
  • afterRender() public

    After render callback. afterRender is called after the view file is rendered but before the layout has been rendered.

  • afterRenderFile() public

    After render file callback. Called after any view fragment is rendered.

  • assetTimestamp() public

    Adds a timestamp to a file based resource based on the value of Asset.timestamp in Configure. If Asset.timestamp is true and debug > 0, or Asset.timestamp === 'force' a timestamp will be added.

  • assetUrl() public

    Generate URL for given asset file. Depending on options passed provides full URL with domain name. Also calls Helper::assetTimestamp() to add timestamp to local files

  • beforeLayout() public
    Before layout callback. beforeLayout is called before the layout is rendered.
  • beforeRender() public
    Before render callback. beforeRender is called before the view file is rendered.
  • beforeRenderFile() public

    Before render file callback. Called before any view fragment is rendered.

  • clean() public deprecated

    Used to remove harmful tags from content. Removes a number of well known XSS attacks from content. However, is not guaranteed to remove all possibilities. Escaping content is the best way to prevent all possible attacks.

  • domId() public

    Generates a DOM ID for the selected element, if one is not set. Uses the current View::entity() settings to generate a CamelCased id attribute.

  • entity() public
    Returns the entity reference of the current context as an array of identity parts
  • field() public

    Gets the currently-used model field of the rendering context. Strips off field suffixes such as year, month, day, hour, min, meridian when the current entity is longer than 2 elements.

  • model() public
    Gets the currently-used model of the rendering context.
  • output() public deprecated
    Returns a string generated by a helper method
  • setEntity() public
    Sets this helper's model and field properties to the dot-separated value-pair in $entity.
  • url() public
    Finds URL for specified action.
  • value() public
    Gets the data for the current tag
  • webroot() public
    Checks if a file exists when theme is used, if no file is found default location is returned

Method Detail

__call() public ¶

__call( string $method , array $params )

Provide non fatal errors on missing method calls.

Parameters
string $method
Method to invoke
array $params
Array of params for the method.

__construct() public ¶

__construct( View $View , array $settings = array() )

Default Constructor

Parameters
View $View
The View this helper is being attached to.
array $settings optional array()
Configuration settings for the helper.
Overrides
Object::__construct()

__get() public deprecated ¶

__get( string $name )

Lazy loads helpers. Provides access to deprecated request properties as well.

Deprecated
Accessing request properties through this method is deprecated and will be removed in 3.0.
Parameters
string $name
Name of the property being accessed.
Returns
mixed
Helper or property found at $name

__set() public deprecated ¶

__set( string $name , mixed $value )

Provides backwards compatibility access for setting values to the request object.

Deprecated
This method will be removed in 3.0
Parameters
string $name
Name of the property being accessed.
mixed $value

_clean() protected ¶

_clean( )

Removes harmful content from output

_confirm() protected ¶

_confirm( string $message , string $okCode , string $cancelCode = '' , array $options = array() )

Returns a string to be used as onclick handler for confirm dialogs.

Parameters
string $message
Message to be displayed
string $okCode
Code to be executed after user chose 'OK'
string $cancelCode optional ''
Code to be executed after user chose 'Cancel'
array $options optional array()
Array of options
Returns
string
onclick JS code

_encodeUrl() protected ¶

_encodeUrl( string $url )

Encodes a URL for use in HTML attributes.

Parameters
string $url
The URL to encode.
Returns
string
The URL encoded for both URL & HTML contexts.

_formatAttribute() protected deprecated ¶

_formatAttribute( string $key , string $value , boolean $escape = true )

Formats an individual attribute, and returns the string value of the composed attribute. Works with minimized attributes that have the same value as their name such as 'disabled' and 'checked'

Deprecated
This method will be moved to HtmlHelper in 3.0
Parameters
string $key
The name of the attribute to create
string $value
The value of the attribute to create.
boolean $escape optional true
Define if the value must be escaped
Returns
string
The composed attribute.

_initInputField() protected ¶

_initInputField( string $field , array $options = array() )

Sets the defaults for an input tag. Will set the name, value, and id attributes for an array of html attributes.

Parameters
string $field
The field name to initialize.
array $options optional array()
Array of options to use while initializing an input field.
Returns
array
Array options for the form input.

_name() protected ¶

_name( array|string $options = array() , string $field = null , string $key = 'name' )

Gets the input field name for the current tag. Creates input name attributes using CakePHP's data[Model][field] formatting.

Parameters
array|string $options optional array()

If an array, should be an array of attributes that $key needs to be added to. If a string or null, will be used as the View entity.

string $field optional null
string $key optional 'name'
The name of the attribute to be set, defaults to 'name'
Returns
mixed

If an array was given for $options, an array with $key set will be returned. If a string was supplied a string will be returned.


_parseAttributes() protected deprecated ¶

_parseAttributes( array $options , array $exclude = null , string $insertBefore = ' ' , string $insertAfter = null )

Returns a space-delimited string with items of the $options array. If a key of $options array happens to be one of those listed in Helper::$_minimizedAttributes

And its value is one of:

  • '1' (string)
  • 1 (integer)
  • true (boolean)
  • 'true' (string)

Then the value will be reset to be identical with key's name. If the value is not one of these 3, the parameter is not output.

'escape' is a special option in that it controls the conversion of attributes to their html-entity encoded equivalents. Set to false to disable html-encoding.

If value for any option key is set to null or false, that option will be excluded from output.

Deprecated
This method will be moved to HtmlHelper in 3.0
Parameters
array $options
Array of options.
array $exclude optional null
Array of options to be excluded, the options here will not be part of the return.
string $insertBefore optional ' '
String to be inserted before options.
string $insertAfter optional null
String to be inserted after options.
Returns
string
Composed attributes.

_reset() protected ¶

_reset( )

Resets the vars used by Helper::clean() to null

_selectedArray() protected ¶

_selectedArray( string|array $data , string $key = 'id' )

Transforms a recordset from a hasAndBelongsToMany association to a list of selected options for a multiple select element

Parameters
string|array $data
string $key optional 'id'
Returns
array

addClass() public ¶

addClass( array $options = array() , string $class = null , string $key = 'class' )

Adds the given class to the element options

Parameters
array $options optional array()
Array options/attributes to add a class to
string $class optional null
The class name being added.
string $key optional 'class'
the key to use for class.
Returns
array
Array of options with $key set.

afterLayout() public ¶

afterLayout( string $layoutFile )

After layout callback. afterLayout is called after the layout has rendered.

Overridden in subclasses.

Parameters
string $layoutFile
The layout file that was rendered.

afterRender() public ¶

afterRender( string $viewFile )

After render callback. afterRender is called after the view file is rendered but before the layout has been rendered.

Overridden in subclasses.

Parameters
string $viewFile
The view file that was rendered.

afterRenderFile() public ¶

afterRenderFile( string $viewFile , string $content )

After render file callback. Called after any view fragment is rendered.

Overridden in subclasses.

Parameters
string $viewFile
The file just be rendered.
string $content
The content that was rendered.

assetTimestamp() public ¶

assetTimestamp( string $path )

Adds a timestamp to a file based resource based on the value of Asset.timestamp in Configure. If Asset.timestamp is true and debug > 0, or Asset.timestamp === 'force' a timestamp will be added.

Parameters
string $path
The file path to timestamp, the path must be inside WWW_ROOT
Returns
string
Path with a timestamp added, or not.

assetUrl() public ¶

assetUrl( string|array $path , array $options = array() )

Generate URL for given asset file. Depending on options passed provides full URL with domain name. Also calls Helper::assetTimestamp() to add timestamp to local files

Parameters
string|array $path
string or URL array
array $options optional array()

Options array. Possible keys: fullBase Return full URL with domain name pathPrefix Path prefix for relative URLs ext Asset extension to append plugin False value will prevent parsing path as a plugin

Returns
string
Generated URL

beforeLayout() public ¶

beforeLayout( string $layoutFile )

Before layout callback. beforeLayout is called before the layout is rendered.

Overridden in subclasses.

Parameters
string $layoutFile
The layout about to be rendered.

beforeRender() public ¶

beforeRender( string $viewFile )

Before render callback. beforeRender is called before the view file is rendered.

Overridden in subclasses.

Parameters
string $viewFile
The view file that is going to be rendered

beforeRenderFile() public ¶

beforeRenderFile( string $viewFile )

Before render file callback. Called before any view fragment is rendered.

Overridden in subclasses.

Parameters
string $viewFile
The file about to be rendered.

clean() public deprecated ¶

clean( string|array $output )

Used to remove harmful tags from content. Removes a number of well known XSS attacks from content. However, is not guaranteed to remove all possibilities. Escaping content is the best way to prevent all possible attacks.

Deprecated
This method will be removed in 3.0
Parameters
string|array $output
Either an array of strings to clean or a single string to clean.
Returns
string|array
cleaned content for output

domId() public ¶

domId( array|string $options = null , string $id = 'id' )

Generates a DOM ID for the selected element, if one is not set. Uses the current View::entity() settings to generate a CamelCased id attribute.

Parameters
array|string $options optional null

Either an array of html attributes to add $id into, or a string with a view entity path to get a domId for.

string $id optional 'id'
The name of the 'id' attribute.
Returns
mixed

If $options was an array, an array will be returned with $id set. If a string was supplied, a string will be returned.


entity() public ¶

entity( )

Returns the entity reference of the current context as an array of identity parts

Returns
array
An array containing the identity elements of an entity

field() public ¶

field( )

Gets the currently-used model field of the rendering context. Strips off field suffixes such as year, month, day, hour, min, meridian when the current entity is longer than 2 elements.

Returns
string

model() public ¶

model( )

Gets the currently-used model of the rendering context.

Returns
string

output() public deprecated ¶

output( string $str )

Returns a string generated by a helper method

This method can be overridden in subclasses to do generalized output post-processing

Deprecated
This method will be removed in future versions.
Parameters
string $str
String to be output.
Returns
string

setEntity() public ¶

setEntity( string $entity , boolean $setScope = false )

Sets this helper's model and field properties to the dot-separated value-pair in $entity.

Parameters
string $entity
A field name, like "ModelName.fieldName" or "ModelName.ID.fieldName"
boolean $setScope optional false
Sets the view scope to the model specified in $tagValue

url() public ¶

url( string|array $url = null , boolean $full = false )

Finds URL for specified action.

Returns a URL pointing at the provided parameters.

Parameters
string|array $url optional null

Either a relative string url like /products/view/23 or an array of URL parameters. Using an array for URLs will allow you to leverage the reverse routing features of CakePHP.

boolean $full optional false
If true, the full base URL will be prepended to the result
Returns
string
Full translated URL with base path.
Link
http://book.cakephp.org/2.0/en/views/helpers.html

value() public ¶

value( array|string $options = array() , string $field = null , string $key = 'value' )

Gets the data for the current tag

Parameters
array|string $options optional array()

If an array, should be an array of attributes that $key needs to be added to. If a string or null, will be used as the View entity.

string $field optional null
string $key optional 'value'
The name of the attribute to be set, defaults to 'value'
Returns
mixed

If an array was given for $options, an array with $key set will be returned. If a string was supplied a string will be returned.


webroot() public ¶

webroot( string $file )

Checks if a file exists when theme is used, if no file is found default location is returned

Parameters
string $file
The file to create a webroot path to.
Returns
string
Web accessible path to file.

Methods inherited from Object

_mergeVars() protected ¶

_mergeVars( array $properties , string $class , boolean $normalize = true )

Merges this objects $property with the property in $class' definition. This classes value for the property will be merged on top of $class'

This provides some of the DRY magic CakePHP provides. If you want to shut it off, redefine this method as an empty function.

Parameters
array $properties
The name of the properties to merge.
string $class
The class to merge the property with.
boolean $normalize optional true
Set to true to run the properties through Hash::normalize() before merging.

_set() protected ¶

_set( array $properties = array() )

Allows setting of multiple properties of the object in a single line of code. Will only set properties that are part of a class declaration.

Parameters
array $properties optional array()
An associative array containing properties and corresponding values.

_stop() protected ¶

_stop( integer|string $status = 0 )

Stop execution of the current script. Wraps exit() making testing easier.

Parameters
integer|string $status optional 0
see http://php.net/exit for values

dispatchMethod() public ¶

dispatchMethod( string $method , array $params = array() )

Calls a method on this object with the given parameters. Provides an OO wrapper for call_user_func_array

Parameters
string $method
Name of the method to call
array $params optional array()
Parameter list to use when calling $method
Returns
mixed
Returns the result of the method call

log() public ¶

log( string $msg , integer $type = LOG_ERR , null|string|array $scope = null )

Convenience method to write a message to CakeLog. See CakeLog::write() for more information on writing to logs.

Parameters
string $msg
Log message
integer $type optional LOG_ERR
Error type constant. Defined in app/Config/core.php.
null|string|array $scope optional null

The scope(s) a log message is being created in. See CakeLog::config() for more information on logging scopes.

Returns
boolean
Success of log write

requestAction() public ¶

requestAction( string|array $url , array $extra = array() )

Calls a controller's method from any location. Can be used to connect controllers together or tie plugins into a main application. requestAction can be used to return rendered views or fetch the return value from controller actions.

Under the hood this method uses Router::reverse() to convert the $url parameter into a string URL. You should use URL formats that are compatible with Router::reverse()

Passing POST and GET data

POST and GET data can be simulated in requestAction. Use $extra['url'] for GET data. The $extra['data'] parameter allows POST data simulation.

Parameters
string|array $url

String or array-based URL. Unlike other URL arrays in CakePHP, this URL will not automatically handle passed and named arguments in the $url parameter.

array $extra optional array()

if array includes the key "return" it sets the AutoRender to true. Can also be used to submit GET/POST data, and named/passed arguments.

Returns
mixed

Boolean true or false on success/failure, or contents of rendered action if 'return' is set in $extra.


toString() public ¶

toString( )

Object-to-string conversion. Each class can override this method as necessary.

Returns
string
The name of this class

Properties detail

$_View ¶

protected View

The View instance this helper is attached to

$_association ¶

protected string

The name of the current model association entities are in scope of.

See
Helper::setEntity()

$_attributeFormat ¶

protected string

Format to attribute

'%s="%s"'

$_cleaned ¶

protected mixed

Holds the cleaned content.

null

$_entityPath ¶

protected string

The dot separated list of elements the current field entity is for.

See
Helper::setEntity()

$_fieldSuffixes ¶

protected array

A list of strings that should be treated as suffixes, or sub inputs for a parent input. This is used for date/time inputs primarily.

array(
    'year', 'month', 'day', 'hour', 'min', 'second', 'meridian'
)

$_helperMap ¶

protected array

A helper lookup table used to lazy load helper objects.

array()

$_minimizedAttributeFormat ¶

protected string

Format to attribute

'%s="%s"'

$_minimizedAttributes ¶

protected array

Minimized attributes

array(
    'compact', 'checked', 'declare', 'readonly', 'disabled', 'selected',
    'defer', 'ismap', 'nohref', 'noshade', 'nowrap', 'multiple', 'noresize',
    'autoplay', 'controls', 'loop', 'muted', 'required', 'novalidate', 'formnovalidate'
)

$_modelScope ¶

protected string

The name of the current model entities are in scope of.

See
Helper::setEntity()

$_tainted ¶

protected mixed

Holds the content to be cleaned.

null

$fieldset ¶

public array

Holds the fields array('field_name' => array('type' => 'string', 'length' => 100), primaryKey and validates array('field_name')

array()

$helpers ¶

public array

List of helpers used by this helper

array()

$plugin ¶

public string

Plugin path

null

$request ¶

public CakeRequest

Request object

null

$settings ¶

public array

Settings for this helper.

array()

$tags ¶

public array

Holds tag templates.

array()

$theme ¶

public string

The current theme name if any.

null
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