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.
Property Summary
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$_componentMap protected
arrayA component lookup table used to lazy load component objects.
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$_config protected
arrayRuntime config
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$_configInitialized protected
boolWhether the config property has already been configured with defaults
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$_defaultConfig protected
arrayDefault configuration
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$_registry protected
Cake\Controller\ComponentRegistryComponent registry class used to lazy load components.
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$_session protected
Cake\Network\SessionThe Session object instance
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$components public
arrayOther Components this component uses.
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$request public
Cake\Network\RequestRequest object
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$response public
Cake\Network\ResponseResponse object
Method Summary
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__call() public
Magic method for verbose flash methods based on element names.
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__construct() public
Constructor
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__debugInfo() public
Returns an array that can be used to describe the internal state of this object.
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__get() public
Magic method for lazy loading $components.
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_configDelete() protected
Delete a single config key
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_configRead() protected
Read a config variable
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_configWrite() protected
Write a config variable
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config() public
Usage
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configShallow() public
Merge provided config with existing config. Unlike
config()which does a recursive merge for nested keys, this method does a simple merge. -
implementedEvents() public
Get the Controller callbacks this Component is interested in.
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initialize() public
Constructor hook method.
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log() public
Convenience method to write a message to Log. See Log::write() for more information on writing to logs.
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set() public
Used to set a session variable that can be used to output messages in the view.
Method Detail
__call() ¶ public
__call(string $name, array $args): voidMagic 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.
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: $this->Flash->warning('My message', ['plugin' => 'PluginName']) would
use the warning.ctp element under plugins/PluginName/src/Template/Element/Flash for
rendering the flash message.
Parameters
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string$name Element name to use.
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array$args Parameters to pass when calling
FlashComponent::set().
Returns
voidThrows
Cake\Network\Exception\InternalErrorExceptionIf missing the flash message.
__construct() ¶ public
__construct(ComponentRegistry $registry, array $config = [])Constructor
Parameters
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ComponentRegistry$registry A ComponentRegistry for this component
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array$config optional Array of config.
__debugInfo() ¶ public
__debugInfo(): arrayReturns an array that can be used to describe the internal state of this object.
Returns
array__get() ¶ public
__get(string $name): mixedMagic method for lazy loading $components.
Parameters
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string$name Name of component to get.
Returns
mixedA Component object or null.
_configDelete() ¶ protected
_configDelete(string $key): voidDelete a single config key
Parameters
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string$key Key to delete.
Returns
voidThrows
Cake\Core\Exception\Exceptionif attempting to clobber existing config
_configRead() ¶ protected
_configRead(string|null $key): mixedRead a config variable
Parameters
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string|null$key Key to read.
Returns
mixed_configWrite() ¶ protected
_configWrite(string|array $key, mixed $value, bool|string $merge = false): voidWrite a config variable
Parameters
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string|array$key Key to write to.
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mixed$value Value to write.
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bool|string$merge optional True to merge recursively, 'shallow' for simple merge, false to overwrite, defaults to false.
Returns
voidThrows
Cake\Core\Exception\Exceptionif attempting to clobber existing config
config() ¶ public
config(string|array|null $key = null, mixed|null $value = null, bool $merge = true): mixedUsage
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:
$this->config(['one' => 'value', 'another' => 'value']);Parameters
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string|array|null$key optional The key to get/set, or a complete array of configs.
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mixed|null$value optional The value to set.
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bool$merge optional Whether to recursively merge or overwrite existing config, defaults to true.
Returns
mixedConfig value being read, or the object itself on write operations.
Throws
Cake\Core\Exception\ExceptionWhen trying to set a key that is invalid.
configShallow() ¶ public
configShallow(string|array $key, mixed|null $value = null): $thisMerge 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->config('key', $value);Setting a nested value:
$this->config('some.nested.key', $value);Updating multiple config settings at the same time:
$this->config(['one' => 'value', 'another' => 'value']);Parameters
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string|array$key The key to set, or a complete array of configs.
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mixed|null$value optional The value to set.
Returns
$thisThe object itself.
implementedEvents() ¶ public
implementedEvents(): arrayGet 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
arrayinitialize() ¶ public
initialize(array $config): voidConstructor hook method.
Implement this method to avoid having to overwrite the constructor and call parent.
Parameters
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array$config The configuration settings provided to this component.
Returns
voidlog() ¶ public
log(mixed $msg, int|string $level = LogLevel::ERROR, string|array $context = []): boolConvenience method to write a message to Log. See Log::write() for more information on writing to logs.
Parameters
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mixed$msg Log message.
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int|string$level optional Error level.
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string|array$context optional Additional log data relevant to this message.
Returns
boolSuccess of log write.
set() ¶ public
set(string|Exception $message, array $options = []): voidUsed to set a session variable that can be used to output messages in the view.
In your controller: $this->Flash->set('This has been saved');
Options:
keyThe key to set under the session's Flash keyelementThe element used to render the flash message. Default to 'default'.paramsAn array of variables to make available when using an element
Parameters
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string|Exception$message Message to be flashed. If an instance of \Exception the exception message will be used and code will be set in params.
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array$options optional An array of options
Returns
voidProperty Detail
$_configInitialized ¶ protected
Whether the config property has already been configured with defaults
Type
bool$_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