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Showing content from https://www.yiiframework.com/doc/api/2.0/yii-log-dispatcher below:

Dispatcher, yii\log\Dispatcher | API Documentation for Yii 2.0

Class yii\log\Dispatcher

Dispatcher manages a set of log targets.

Dispatcher implements the dispatch()-method that forwards the log messages from a yii\log\Logger to the registered log $targets.

An instance of Dispatcher is registered as a core application component and can be accessed using Yii::$app->log.

You may configure the targets in application configuration, like the following:

[
    'components' => [
        'log' => [
            'targets' => [
                'file' => [
                    'class' => 'yii\log\FileTarget',
                    'levels' => ['trace', 'info'],
                    'categories' => ['yii\*'],
                ],
                'email' => [
                    'class' => 'yii\log\EmailTarget',
                    'levels' => ['error', 'warning'],
                    'message' => [
                        'to' => 'admin@example.com',
                    ],
                ],
            ],
        ],
    ],
]

Each log target can have a name and can be referenced via the $targets property as follows:

Yii::$app->log->targets['file']->enabled = false;

Property Details

Hide inherited properties

The log targets. Each array element represents a single log target instance or the configuration for creating the log target instance.

How many application call stacks should be logged together with each message. This method returns the value of yii\log\Logger::$traceLevel. Defaults to 0.

Method Details

Hide inherited methods

Defined in: yii\base\Component::__call()

Calls the named method which is not a class method.

This method will check if any attached behavior has the named method and will execute it if available.

Do not call this method directly as it is a PHP magic method that will be implicitly called when an unknown method is being invoked.

Source code

                public function __call($name, $params)
{
    $this->ensureBehaviors();
    foreach ($this->_behaviors as $object) {
        if ($object->hasMethod($name)) {
            return call_user_func_array([$object, $name], $params);
        }
    }
    throw new UnknownMethodException('Calling unknown method: ' . get_class($this) . "::$name()");
}

Defined in: yii\base\Component::__clone()

This method is called after the object is created by cloning an existing one.

It removes all behaviors because they are attached to the old object.

Source code

                public function __clone()
{
    $this->_events = [];
    $this->_eventWildcards = [];
    $this->_behaviors = null;
}

Constructor.

The default implementation does two things:

Initializes the object with the given configuration $config.
Call init().

If this method is overridden in a child class, it is recommended that

the last parameter of the constructor is a configuration array, like $config here.
call the parent implementation at the end of the constructor.

public void __construct ( $config = [] ) $config array

Name-value pairs that will be used to initialize the object properties

Source code

                public function __construct($config = [])
{
    
    if (isset($config['logger'])) {
        $this->setLogger($config['logger']);
        unset($config['logger']);
    }
    
    $this->getLogger();
    parent::__construct($config);
}

Defined in: yii\base\Component::__get()

Returns the value of a component property.

This method will check in the following order and act accordingly:

a property defined by a getter: return the getter result
a property of a behavior: return the behavior property value

Do not call this method directly as it is a PHP magic method that will be implicitly called when executing $value = $component->property;.

See also canGetProperty().

public boolean canSetProperty ( $name, $checkVars = true, $checkBehaviors = true ) $name string

The property name

$checkVars boolean

Whether to treat member variables as properties

$checkBehaviors boolean

Whether to treat behaviors' properties as properties of this component

return boolean

Whether the property can be written

Source code

                public function canSetProperty($name, $checkVars = true, $checkBehaviors = true)
{
    if (method_exists($this, 'set' . $name) || $checkVars && property_exists($this, $name)) {
        return true;
    } elseif ($checkBehaviors) {
        $this->ensureBehaviors();
        foreach ($this->_behaviors as $behavior) {
            if ($behavior->canSetProperty($name, $checkVars)) {
                return true;
            }
        }
    }
    return false;
}

Deprecated since 2.0.14. On PHP >=5.5, use ::class instead.

Source code

                public static function className()
{
    return get_called_class();
}

Source code

                public function detachBehavior($name)
{
    $this->ensureBehaviors();
    if (isset($this->_behaviors[$name])) {
        $behavior = $this->_behaviors[$name];
        unset($this->_behaviors[$name]);
        $behavior->detach();
        return $behavior;
    }
    return null;
}

Source code

                public function detachBehaviors()
{
    $this->ensureBehaviors();
    foreach ($this->_behaviors as $name => $behavior) {
        $this->detachBehavior($name);
    }
}

Dispatches the logged messages to $targets.

public void dispatch ( $messages, $final ) $messages array

The logged messages

$final boolean

Whether this method is called at the end of the current application

Source code

                public function dispatch($messages, $final)
{
    $targetErrors = [];
    foreach ($this->targets as $target) {
        if (!$target->enabled) {
            continue;
        }
        try {
            $target->collect($messages, $final);
        } catch (\Throwable $t) {
            $target->enabled = false;
            $targetErrors[] = $this->generateTargetFailErrorMessage($target, $t, __METHOD__);
        } catch (\Exception $e) {
            $target->enabled = false;
            $targetErrors[] = $this->generateTargetFailErrorMessage($target, $e, __METHOD__);
        }
    }
    if (!empty($targetErrors)) {
        $this->dispatch($targetErrors, true);
    }
}

Source code

                public function ensureBehaviors()
{
    if ($this->_behaviors === null) {
        $this->_behaviors = [];
        foreach ($this->behaviors() as $name => $behavior) {
            $this->attachBehaviorInternal($name, $behavior);
        }
    }
}

Generate target error message

Source code

                protected function generateTargetFailErrorMessage($target, $throwable, $method)
{
    return [
        'Unable to send log via ' . get_class($target) . ': ' . ErrorHandler::convertExceptionToVerboseString($throwable),
        Logger::LEVEL_WARNING,
        $method,
        microtime(true),
        [],
    ];
}

Source code

                public function getBehavior($name)
{
    $this->ensureBehaviors();
    return isset($this->_behaviors[$name]) ? $this->_behaviors[$name] : null;
}

Source code

                public function getBehaviors()
{
    $this->ensureBehaviors();
    return $this->_behaviors;
}

Source code

                public function getFlushInterval()
{
    return $this->getLogger()->flushInterval;
}

Source code

                public function getLogger()
{
    if ($this->_logger === null) {
        $this->setLogger(Yii::getLogger());
    }
    return $this->_logger;
}

Source code

                public function getTraceLevel()
{
    return $this->getLogger()->traceLevel;
}

Source code

                public function hasEventHandlers($name)
{
    $this->ensureBehaviors();
    if (!empty($this->_events[$name])) {
        return true;
    }
    foreach ($this->_eventWildcards as $wildcard => $handlers) {
        if (!empty($handlers) && StringHelper::matchWildcard($wildcard, $name)) {
            return true;
        }
    }
    return Event::hasHandlers($this, $name);
}

Defined in: yii\base\Component::hasMethod()

Returns a value indicating whether a method is defined.

A method is defined if:

the class has a method with the specified name
an attached behavior has a method with the given name (when $checkBehaviors is true).

public boolean hasMethod ( $name, $checkBehaviors = true ) $name string

The property name

$checkBehaviors boolean

Whether to treat behaviors' methods as methods of this component

return boolean

Whether the method is defined

Source code

                public function hasMethod($name, $checkBehaviors = true)
{
    if (method_exists($this, $name)) {
        return true;
    } elseif ($checkBehaviors) {
        $this->ensureBehaviors();
        foreach ($this->_behaviors as $behavior) {
            if ($behavior->hasMethod($name)) {
                return true;
            }
        }
    }
    return false;
}

Defined in: yii\base\Component::hasProperty()

Returns a value indicating whether a property is defined for this component.

A property is defined if:

the class has a getter or setter method associated with the specified name (in this case, property name is case-insensitive);
the class has a member variable with the specified name (when $checkVars is true);
an attached behavior has a property of the given name (when $checkBehaviors is true).