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

Property 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.
$_session protected deprecated

Cake\Http\Session

The Session object instance
$components public

array

Other Components this component uses.
$request public deprecated

Cake\Http\ServerRequest

Request object
$response public deprecated

Cake\Http\Response

Response object

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.
config() public deprecated

Gets/Sets the config.
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 @method

Set a message using "error" element
getConfig() public

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

Sets the config.
success() public @method

Set a message using "success" element

Method Detail

__call() ¶ public

__call(string $name, array $args): void

Magic method for verbose flash methods based on element names.

For example: $this->Flash->success('My message') would use the success.ctp element under src/Template/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.ctp element under plugins/PluginName/src/Template/Element/Flash for rendering the flash message.

Parameters

string $name: Element name to use.
array $args: Parameters to pass when calling FlashComponent::set().

Returns

void

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 ComponentRegistry for this component
array $config optional: Array of config.

__debugInfo() ¶ public

__debugInfo(): array

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

Returns

array

__get() ¶ public

__get(string $name): mixed

Magic method for lazy loading $components.

Parameters

string $name: Name of component to get.

Returns

mixed

A Component object or null.

_configDelete() ¶ protected

_configDelete(string $key): void

Deletes a single config key.

Parameters

string $key: Key to delete.

Returns

void

Throws

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

_configRead() ¶ protected

_configRead(string|null $key): mixed

Reads a config key.

Parameters

string|null $key: Key to read.

Returns

mixed

_configWrite() ¶ protected

_configWrite(string|array $key, mixed $value, bool|string $merge = false): void

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.

Returns

void

Throws

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

config() ¶ public

config(string|array|null $key = null, mixed|null $value = null, bool $merge = true): mixed

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']);

Parameters

string|array|null $key optional: The key to get/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

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() ¶ public

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

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 @method

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

Set a message using "error" element

Parameters

string $message
array $options optional

Returns

void

getConfig() ¶ public

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

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

Config value being read.

getController() ¶ public

getController(): Cake\Controller\Controller

Get the controller this component is bound to.

Returns

Cake\Controller\Controller

The bound controller.

getSession() ¶ protected

getSession(): Cake\Http\Session

Returns current session object from a controller request.

Returns

Cake\Http\Session

implementedEvents() ¶ public

implementedEvents(): array

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): void

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.

Returns

void

log() ¶ public

log(mixed $msg, int|string $level = LogLevel::ERROR, string|array $context = []): bool

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

Parameters

mixed $msg: 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(string|Exception $message, array $options = []): void

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

Returns

void

setConfig() ¶ public

setConfig(string|array $key, mixed|null $value = null, bool $merge = true): $this

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 @method

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

Set a message using "success" element

Parameters

string $message
array $options optional

Returns

void

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

These are merged with user-provided config when the component is used.

Type

array

`$_registry` ¶ protected

Component registry class used to lazy load components.

Type

Cake\Controller\ComponentRegistry

`$_session` ¶ protected deprecated

The Session object instance

Type

Cake\Http\Session

`$components` ¶ public

Other Components this component uses.

Type

array

`$request` ¶ public deprecated

Request object

Type

Cake\Http\ServerRequest

`$response` ¶ public deprecated

Response object

Type

Cake\Http\Response

Namespaces

Class FlashComponent

Property Summary

Method Summary

__call() public

__construct() public

__debugInfo() public

__get() public

_configDelete() protected

_configRead() protected

_configWrite() protected

config() public deprecated

configShallow() public

error() public @method

getConfig() public

getController() public

getSession() protected

implementedEvents() public

initialize() public

log() public

set() public

setConfig() public

success() public @method

Method Detail

__call() ¶ public

Parameters

Returns

Throws

__construct() ¶ public

Parameters

__debugInfo() ¶ public

Returns

__get() ¶ public

Parameters

Returns

_configDelete() ¶ protected

Parameters

Returns

Throws

_configRead() ¶ protected

Parameters

Returns

_configWrite() ¶ protected

Parameters

Returns

Throws

config() ¶ public

Usage

Parameters

Returns

Throws

configShallow() ¶ public

Parameters

Returns

error() ¶ public @method

Parameters

Returns

getConfig() ¶ public

Usage

Parameters

Returns

getController() ¶ public

Returns

getSession() ¶ protected

Returns

implementedEvents() ¶ public

Returns

initialize() ¶ public

Parameters

Returns

log() ¶ public

Parameters

Returns

set() ¶ public

Options:

Parameters

Returns

setConfig() ¶ public

Usage

Parameters

`$_componentMap` ¶ protected

`$_config` ¶ protected

`$_configInitialized` ¶ protected

`$_defaultConfig` ¶ protected

`$_registry` ¶ protected

`$_session` ¶ protected deprecated

`$components` ¶ public

`$request` ¶ public deprecated

`$response` ¶ public deprecated