Class FlashHelper

FlashHelper class to render flash messages.

After setting messages in your controllers with FlashComponent, you can use this class to output your flash messages in your views.

Cake\View\Helper implements Cake\Event\EventListenerInterface uses Cake\Core\InstanceConfigTrait
Extended by Cake\View\Helper\FlashHelper

Inherited Properties

Method Summary

Method Detail

implementedEvents()source public

implementedEvents( )

Event listeners.

Returns

array

Overrides

Cake\View\Helper::implementedEvents()

render()source public

render( string $key 'flash' , array $options [] )

Used to render the message set in FlashComponent::set()

In your view: $this->Flash->render('somekey'); Will default to flash if no param is passed

You can pass additional information into the flash message generation. This allows you to consolidate all the parameters for a given type of flash message into the view.

echo $this->Flash->render('flash', ['params' => ['name' => $user['User']['name']]]);

This would pass the current user's name into the flash message, so you could create personalized messages without the controller needing access to that data.

Lastly you can choose the element that is used for rendering the flash message. Using custom elements allows you to fully customize how flash messages are generated.

echo $this->Flash->render('flash', ['element' => 'my_custom_element']);

If you want to use an element from a plugin for rendering your flash message you can use the dot notation for the plugin's element name:

echo $this->Flash->render('flash', [
  'element' => 'MyPlugin.my_custom_element',
]);

If you have several messages stored in the Session, each message will be rendered in its own element.

Parameters

string $key optional 'flash'
The [Flash.]key you are rendering in the view.
array $options optional []

Additional options to use for the creation of this flash message. Supports the 'params', and 'element' keys that are used in the helper.

Returns

string|null

Rendered flash message or null if flash key does not exist in session.


Throws

UnexpectedValueException
If value for flash settings key is not an array.

Methods inherited from Cake\View\Helper

__call()source 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()source public

__construct( Cake\View\View $View , array $config [] )

Default Constructor

Parameters

Cake\View\View $View
The View this helper is being attached to.
array $config optional []
Configuration settings for the helper.

__debugInfo()source public

__debugInfo( )

Returns an array that can be used to describe the internal state of this object.

Returns

array

__get()source public

__get( string $name )

Lazy loads helpers.

Parameters

string $name
Name of the property being accessed.

Returns

Cake\View\Helper|null
Helper instance if helper with provided name exists

_confirm()source protected

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

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 of options

Returns

string
onclick JS code

addClass()source public

addClass( array $options [] , string|null $class null , string $key 'class' )

Adds the given class to the element options

Parameters

array $options optional []
Array options/attributes to add a class to
string|null $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.

getView()source public

getView( )

Get the view instance this helper is bound to.

Returns

Cake\View\View
The bound view instance.

initialize()source public

initialize( array $config )

Constructor hook method.

Implement this method to avoid having to overwrite the constructor and call parent.

Parameters

array $config
The configuration settings provided to this helper.

Methods used from Cake\Core\InstanceConfigTrait

_configDelete()source protected

_configDelete( string $key )

Deletes a single config key.

Parameters

string $key
Key to delete.

Throws

Cake\Core\Exception\Exception
if attempting to clobber existing config

_configRead()source protected

_configRead( string|null $key )

Reads a config key.

Parameters

string|null $key
Key to read.

Returns

mixed

_configWrite()source protected

_configWrite( string|array $key , mixed $value , boolean|string $merge false )

Writes a config key.

Parameters

string|array $key
Key to write to.
mixed $value
Value to write.
boolean|string $merge optional false

True to merge recursively, 'shallow' for simple merge, false to overwrite, defaults to false.

Throws

Cake\Core\Exception\Exception
if attempting to clobber existing config

config()source public

config( string|array|null $key null , mixed|null $value null , boolean $merge true )

Gets/Sets the config.

Usage

Reading the whole config:

$this->config();

Reading a specific value:

$this->config('key');

Reading a nested value:

$this->config('some.nested.key');

Setting a specific value:

$this->config('key', $value);

Setting a nested value:

$this->config('some.nested.key', $value);

Updating multiple config settings at the same time:

$this->config(['one' => 'value', 'another' => 'value']);

Deprecated

3.4.0 use setConfig()/getConfig() instead.

Parameters

string|array|null $key optional null
The key to get/set, or a complete array of configs.
mixed|null $value optional null
The value to set.
boolean $merge optional true
Whether to recursively merge or overwrite existing config, defaults to true.

Returns

mixed
Config value being read, or the object itself on write operations.

Throws

Cake\Core\Exception\Exception
When trying to set a key that is invalid.

configShallow()source public

configShallow( string|array $key , mixed|null $value null )

Merge provided config with existing config. Unlike config() which does a recursive merge for nested keys, this method does a simple merge.

Setting a specific value:

$this->configShallow('key', $value);

Setting a nested value:

$this->configShallow('some.nested.key', $value);

Updating multiple config settings at the same time:

$this->configShallow(['one' => 'value', 'another' => 'value']);

Parameters

string|array $key
The key to set, or a complete array of configs.
mixed|null $value optional null
The value to set.

Returns


$this

getConfig()source public

getConfig( string|null $key null , mixed $default null )

Returns the config.

Usage

Reading the whole config:

$this->getConfig();

Reading a specific value:

$this->getConfig('key');

Reading a nested value:

$this->getConfig('some.nested.key');

Reading with default value:

$this->getConfig('some-key', 'default-value');

Parameters

string|null $key optional null
The key to get or null for the whole config.
mixed $default optional null
The return value when the key does not exist.

Returns

mixed
Config value being read.

setConfig()source public

setConfig( string|array $key , mixed|null $value null , boolean $merge true )

Sets the config.

Usage

Setting a specific value:

$this->setConfig('key', $value);

Setting a nested value:

$this->setConfig('some.nested.key', $value);

Updating multiple config settings at the same time:

$this->setConfig(['one' => 'value', 'another' => 'value']);

Parameters

string|array $key
The key to set, or a complete array of configs.
mixed|null $value optional null
The value to set.
boolean $merge optional true
Whether to recursively merge or overwrite existing config, defaults to true.

Returns


$this

Throws

Cake\Core\Exception\Exception
When trying to set a key that is invalid.

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https://api.cakephp.org/3.4/class-Cake.View.Helper.FlashHelper.html