Class FlashComponent

The CakePHP FlashComponent provides a way for you to write a flash variable to the session from your controllers, to be rendered in a view with the FlashHelper.

Namespace: Cake\Controller\Component

Properties summary

  • $_componentMap protected
    array

    A component lookup table used to lazy load component objects.

  • $_config protected
    array

    Runtime config

  • $_configInitialized protected
    bool

    Whether the config property has already been configured with defaults

  • $_defaultConfig protected
    array

    Default configuration

  • $_registry protected
    \Cake\Controller\ComponentRegistry

    Component registry class used to lazy load components.

  • $components public
    array

    Other Components this component uses.

Method Summary

  • __call() public

    Magic method for verbose flash methods based on element names.

  • __construct() public

    Constructor

  • __debugInfo() public

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

  • __get() public

    Magic method for lazy loading $components.

  • _configDelete() protected

    Deletes a single config key.

  • _configRead() protected

    Reads a config key.

  • _configWrite() protected

    Writes a config key.

  • configShallow() public

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

  • error() public

    Set a message using "error" element

  • getConfig() public

    Returns the config.

  • getConfigOrFail() public

    Returns the config for this specific key.

  • getController() public

    Get the controller this component is bound to.

  • getSession() protected

    Returns current session object from a controller request.

  • implementedEvents() public

    Get the Controller callbacks this Component is interested in.

  • initialize() public

    Constructor hook method.

  • log() public

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

  • set() public

    Used to set a session variable that can be used to output messages in the view.

  • setConfig() public

    Sets the config.

  • success() public

    Set a message using "success" element

Method Detail

__call() public 

__call(string $name, array $args)

Magic method for verbose flash methods based on element names.

For example: $this->Flash->success('My message') would use the success.php element under templates/Element/Flash for rendering the flash message.

If you make consecutive calls to this method, the messages will stack (if they are set with the same flash key)

Note that the parameter element will be always overridden. In order to call a specific element from a plugin, you should set the plugin option in $args.

For example: $this->Flash->warning('My message', ['plugin' => 'PluginName']) would use the warning.php element under plugins/PluginName/templates/Element/Flash for rendering the flash message.

Parameters

string $name

Element name to use.

array $args

Parameters to pass when calling FlashComponent::set().

Throws

Cake\Http\Exception\InternalErrorException
If missing the flash message.

__construct() public 

__construct(\Cake\Controller\ComponentRegistry $registry, array $config)

Constructor

Parameters

\Cake\Controller\ComponentRegistry $registry

A component registry this component can use to lazy load its components.

array $config optional

Array of configuration settings.

__debugInfo() public 

__debugInfo()

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

Returns

array

__get() public 

__get(string $name)

Magic method for lazy loading $components.

Parameters

string $name

Name of component to get.

Returns

\Cake\Controller\Component|null

A Component object or null.

_configDelete() 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() protected 

_configRead(?string $key)

Reads a config key.

Parameters

string|null $key

Key to read.

Returns

mixed

_configWrite() protected 

_configWrite(mixed $key, mixed $value, mixed $merge)

Writes a config key.

Parameters

string|array $key

Key to write to.

mixed $value

Value to write.

bool|string $merge optional

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

configShallow() public 

configShallow(mixed $key, mixed $value)

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

The value to set.

Returns

$this

error() public 

error(string $message, array $options = [])

Set a message using "error" element

Parameters

string $message
array $options = []

getConfig() public 

getConfig(?string $key, mixed $default)

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

The key to get or null for the whole config.

mixed $default optional

The return value when the key does not exist.

Returns

mixed

Configuration data at the named key or null if the key does not exist.

getConfigOrFail() public 

getConfigOrFail(string $key)

Returns the config for this specific key.

The config value for this key must exist, it can never be null.

Parameters

string $key

The key to get.

Returns

mixed

Configuration data at the named key

Throws

InvalidArgumentException

getController() public 

getController()

Get the controller this component is bound to.

Returns

\Cake\Controller\Controller

The bound controller.

getSession() protected 

getSession()

Returns current session object from a controller request.

Returns

\Cake\Http\Session

implementedEvents() public 

implementedEvents()

Get the Controller callbacks this Component is interested in.

Uses Conventions to map controller events to standard component callback method names. By defining one of the callback methods a component is assumed to be interested in the related event.

Override this method if you need to add non-conventional event listeners. Or if you want components to listen to non-standard events.

Returns

array

initialize() 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 component.

log() public 

log(string $message, mixed $level, mixed $context)

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

Parameters

string $message

Log message.

int|string $level optional

Error level.

string|array $context optional

Additional log data relevant to this message.

Returns

bool

Success of log write.

set() public 

set(mixed $message, array $options)

Used to set a session variable that can be used to output messages in the view.

If you make consecutive calls to this method, the messages will stack (if they are set with the same flash key)

In your controller: $this->Flash->set('This has been saved');

Options:

  • key The key to set under the session's Flash key
  • element The element used to render the flash message. Default to 'default'.
  • params An array of variables to make available when using an element
  • clear A bool stating if the current stack should be cleared to start a new one
  • escape Set to false to allow templates to print out HTML content

Parameters

string|\Exception $message

Message to be flashed. If an instance of \Exception the exception message will be used and code will be set in params.

array $options optional

An array of options

setConfig() public 

setConfig(mixed $key, mixed $value, mixed $merge)

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

The value to set.

bool $merge optional

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.

success() public 

success(string $message, array $options = [])

Set a message using "success" element

Parameters

string $message
array $options = []

Property Detail

$_componentMap protected

A component lookup table used to lazy load component objects.

Type

array

$_config protected

Runtime config

Type

array

$_configInitialized protected

Whether the config property has already been configured with defaults

Type

bool

$_defaultConfig protected

Default configuration

Type

array

$_registry protected

Component registry class used to lazy load components.

Type

\Cake\Controller\ComponentRegistry

$components public

Other Components this component uses.

Type

array

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https://api.cakephp.org/4.0/class-Cake.Controller.Component.FlashComponent.html