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Class yii\log\Logger

Inheritanceyii\log\Logger » yii\base\Component » yii\base\BaseObject
Implementsyii\base\Configurable
Available since version2.0
Source Code https://github.com/yiisoft/yii2/blob/master/framework/log/Logger.php

Logger records logged messages in memory and sends them to different targets if $dispatcher is set.

A Logger instance can be accessed via Yii::getLogger(). You can call the method log() to record a single log message. For convenience, a set of shortcut methods are provided for logging messages of various severity levels via the Yii class:

For more details and usage information on Logger, see the guide article on logging.

When the application ends or $flushInterval is reached, Logger will call flush() to send logged messages to different log targets, such as file, email, or database, with the help of the $dispatcher.

Public Properties

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Property Type Description Defined By
$behaviors yii\base\Behavior[] List of behaviors attached to this component. yii\base\Component
$dbEventNames array Of event names used to get statistical results of DB queries. yii\log\Logger
$dbProfiling array The first element indicates the number of SQL statements executed, and the second element the total time spent in SQL execution. yii\log\Logger
$dispatcher yii\log\Dispatcher The message dispatcher. yii\log\Logger
$elapsedTime float The total elapsed time in seconds for current request. yii\log\Logger
$flushInterval integer How many messages should be logged before they are flushed from memory and sent to targets. yii\log\Logger
$messages array Logged messages. yii\log\Logger
$profiling array The profiling results. yii\log\Logger
$profilingAware boolean Whether the profiling-aware mode should be switched on. yii\log\Logger
$traceLevel integer How much call stack information (file name and line number) should be logged for each message. yii\log\Logger

Public Methods

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Method Description Defined By
__call() Calls the named method which is not a class method. yii\base\Component
__clone() This method is called after the object is created by cloning an existing one. yii\base\Component
__construct() Constructor. yii\base\BaseObject
__get() Returns the value of a component property. yii\base\Component
__isset() Checks if a property is set, i.e. defined and not null. yii\base\Component
__set() Sets the value of a component property. yii\base\Component
__unset() Sets a component property to be null. yii\base\Component
attachBehavior() Attaches a behavior to this component. yii\base\Component
attachBehaviors() Attaches a list of behaviors to the component. yii\base\Component
behaviors() Returns a list of behaviors that this component should behave as. yii\base\Component
calculateTimings() Calculates the elapsed time for the given log messages. yii\log\Logger
canGetProperty() Returns a value indicating whether a property can be read. yii\base\Component
canSetProperty() Returns a value indicating whether a property can be set. yii\base\Component
className() Returns the fully qualified name of this class. yii\base\BaseObject
detachBehavior() Detaches a behavior from the component. yii\base\Component
detachBehaviors() Detaches all behaviors from the component. yii\base\Component
ensureBehaviors() Makes sure that the behaviors declared in behaviors() are attached to this component. yii\base\Component
flush() Flushes log messages from memory to targets. yii\log\Logger
getBehavior() Returns the named behavior object. yii\base\Component
getBehaviors() Returns all behaviors attached to this component. yii\base\Component
getDbProfiling() Returns the statistical results of DB queries. yii\log\Logger
getElapsedTime() Returns the total elapsed time since the start of the current request. yii\log\Logger
getLevelName() Returns the text display of the specified level. yii\log\Logger
getProfiling() Returns the profiling results. yii\log\Logger
hasEventHandlers() Returns a value indicating whether there is any handler attached to the named event. yii\base\Component
hasMethod() Returns a value indicating whether a method is defined. yii\base\Component
hasProperty() Returns a value indicating whether a property is defined for this component. yii\base\Component
init() Initializes the logger by registering flush() as a shutdown function. yii\log\Logger
log() Logs a message with the given type and category. yii\log\Logger
off() Detaches an existing event handler from this component. yii\base\Component
on() Attaches an event handler to an event. yii\base\Component
trigger() Triggers an event. yii\base\Component

Constants

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Constant Value Description Defined By
LEVEL_ERROR 0x1 Error message level. An error message is one that indicates the abnormal termination of the application and may require developer's handling. yii\log\Logger
LEVEL_INFO 0x4 Informational message level. An informational message is one that includes certain information for developers to review. yii\log\Logger
LEVEL_PROFILE 0x40 Profiling message level. This indicates the message is for profiling purpose. yii\log\Logger
LEVEL_PROFILE_BEGIN 0x50 Profiling message level. This indicates the message is for profiling purpose. It marks the beginning of a profiling block. yii\log\Logger
LEVEL_PROFILE_END 0x60 Profiling message level. This indicates the message is for profiling purpose. It marks the end of a profiling block. yii\log\Logger
LEVEL_TRACE 0x8 Tracing message level. A tracing message is one that reveals the code execution flow. yii\log\Logger
LEVEL_WARNING 0x2 Warning message level. A warning message is one that indicates some abnormal happens but the application is able to continue to run. Developers should pay attention to this message. yii\log\Logger

Property Details

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$dbEventNames public property (available since version 2.0.41)

Of event names used to get statistical results of DB queries.

public array $dbEventNames = [
    
'yii\db\Command::query',
    
'yii\db\Command::execute',
]
$dbProfiling public property

The first element indicates the number of SQL statements executed, and the second element the total time spent in SQL execution.

public array $dbProfiling null
$dispatcher public property

The message dispatcher.

$elapsedTime public property

The total elapsed time in seconds for current request.

public float $elapsedTime null
$flushInterval public property

How many messages should be logged before they are flushed from memory and sent to targets. Defaults to 1000, meaning the flush() method will be invoked once every 1000 messages logged. Set this property to be 0 if you don't want to flush messages until the application terminates. This property mainly affects how much memory will be taken by the logged messages. A smaller value means less memory, but will increase the execution time due to the overhead of flush().

public integer $flushInterval 1000
$messages public property

Logged messages. This property is managed by log() and flush(). Each log message is of the following structure:

[
  [0] => message (mixed, can be a string or some complex data, such as an exception object)
  [1] => level (integer)
  [2] => category (string)
  [3] => timestamp (float, obtained by microtime(true))
  [4] => traces (array, debug backtrace, contains the application code call stacks)
  [5] => memory usage in bytes (int, obtained by memory_get_usage()), available since version 2.0.11.
]
public array $messages = []
$profiling public property

The profiling results. Each element is an array consisting of these elements: info, category, timestamp, trace, level, duration, memory, memoryDiff. The memory and memoryDiff values are available since version 2.0.11.

public array $profiling null
$profilingAware public property (available since version 2.0.43)

Whether the profiling-aware mode should be switched on. If on, flush() makes sure that profiling blocks are flushed in pairs. In case that any dangling messages are detected these are kept for the next flush interval to find their pair. To prevent memory leaks, when number of dangling messages reaches flushInterval value, logger flushes them immediately and triggers a warning. Keep in mind that profiling-aware mode is more time and memory consuming.

public boolean $profilingAware false
$traceLevel public property

How much call stack information (file name and line number) should be logged for each message. If it is greater than 0, at most that number of call stacks will be logged. Note that only application call stacks are counted.

public integer $traceLevel 0

Method Details

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__call() public method

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.

public mixed __call ( $name, $params )
$name string

The method name

$params array

Method parameters

return mixed

The method return value

throws yii\base\UnknownMethodException

when calling unknown method

                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()");
}

            
__clone() public method

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.

public void __clone ( )

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

            
__construct() public method

Defined in: yii\base\BaseObject::__construct()

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

                public function __construct($config = [])
{
    if (!empty($config)) {
        Yii::configure($this, $config);
    }
    $this->init();
}

            
__get() public method

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 __set().

public mixed __get ( $name )
$name string

The property name

return mixed

The property value or the value of a behavior's property

throws yii\base\UnknownPropertyException

if the property is not defined

throws yii\base\InvalidCallException

if the property is write-only.

                public function __get($name)
{
    $getter = 'get' . $name;
    if (method_exists($this, $getter)) {
        // read property, e.g. getName()
        return $this->$getter();
    }
    // behavior property
    $this->ensureBehaviors();
    foreach ($this->_behaviors as $behavior) {
        if ($behavior->canGetProperty($name)) {
            return $behavior->$name;
        }
    }
    if (method_exists($this, 'set' . $name)) {
        throw new InvalidCallException('Getting write-only property: ' . get_class($this) . '::' . $name);
    }
    throw new UnknownPropertyException('Getting unknown property: ' . get_class($this) . '::' . $name);
}

            
__isset() public method

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

Checks if a property is set, i.e. defined and not null.

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

  • a property defined by a setter: return whether the property is set
  • a property of a behavior: return whether the property is set
  • return false for non existing properties

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

See also https://www.php.net/manual/en/function.isset.php.

public boolean __isset ( $name )
$name string

The property name or the event name

return boolean

Whether the named property is set

                public function __isset($name)
{
    $getter = 'get' . $name;
    if (method_exists($this, $getter)) {
        return $this->$getter() !== null;
    }
    // behavior property
    $this->ensureBehaviors();
    foreach ($this->_behaviors as $behavior) {
        if ($behavior->canGetProperty($name)) {
            return $behavior->$name !== null;
        }
    }
    return false;
}

            
__set() public method

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

Sets the value of a component property.

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

  • a property defined by a setter: set the property value
  • an event in the format of "on xyz": attach the handler to the event "xyz"
  • a behavior in the format of "as xyz": attach the behavior named as "xyz"
  • a property of a behavior: set the behavior property value

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

See also __get().

public void __set ( $name, $value )
$name string

The property name or the event name

$value mixed

The property value

throws yii\base\UnknownPropertyException

if the property is not defined

throws yii\base\InvalidCallException

if the property is read-only.

                public function __set($name, $value)
{
    $setter = 'set' . $name;
    if (method_exists($this, $setter)) {
        // set property
        $this->$setter($value);
        return;
    } elseif (strncmp($name, 'on ', 3) === 0) {
        // on event: attach event handler
        $this->on(trim(substr($name, 3)), $value);
        return;
    } elseif (strncmp($name, 'as ', 3) === 0) {
        // as behavior: attach behavior
        $name = trim(substr($name, 3));
        $this->attachBehavior($name, $value instanceof Behavior ? $value : Yii::createObject($value));
        return;
    }
    // behavior property
    $this->ensureBehaviors();
    foreach ($this->_behaviors as $behavior) {
        if ($behavior->canSetProperty($name)) {
            $behavior->$name = $value;
            return;
        }
    }
    if (method_exists($this, 'get' . $name)) {
        throw new InvalidCallException('Setting read-only property: ' . get_class($this) . '::' . $name);
    }
    throw new UnknownPropertyException('Setting unknown property: ' . get_class($this) . '::' . $name);
}

            
__unset() public method

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

Sets a component property to be null.

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

  • a property defined by a setter: set the property value to be null
  • a property of a behavior: set the property value to be null

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

See also https://www.php.net/manual/en/function.unset.php.

public void __unset ( $name )
$name string

The property name

throws yii\base\InvalidCallException

if the property is read only.

                public function __unset($name)
{
    $setter = 'set' . $name;
    if (method_exists($this, $setter)) {
        $this->$setter(null);
        return;
    }
    // behavior property
    $this->ensureBehaviors();
    foreach ($this->_behaviors as $behavior) {
        if ($behavior->canSetProperty($name)) {
            $behavior->$name = null;
            return;
        }
    }
    throw new InvalidCallException('Unsetting an unknown or read-only property: ' . get_class($this) . '::' . $name);
}

            
attachBehavior() public method

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

Attaches a behavior to this component.

This method will create the behavior object based on the given configuration. After that, the behavior object will be attached to this component by calling the yii\base\Behavior::attach() method.

See also detachBehavior().

public yii\base\Behavior attachBehavior ( $name, $behavior )
$name string

The name of the behavior.

$behavior string|array|yii\base\Behavior

The behavior configuration. This can be one of the following:

return yii\base\Behavior

The behavior object

                public function attachBehavior($name, $behavior)
{
    $this->ensureBehaviors();
    return $this->attachBehaviorInternal($name, $behavior);
}

            
attachBehaviors() public method

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

Attaches a list of behaviors to the component.

Each behavior is indexed by its name and should be a yii\base\Behavior object, a string specifying the behavior class, or an configuration array for creating the behavior.

See also attachBehavior().

public void attachBehaviors ( $behaviors )
$behaviors array

List of behaviors to be attached to the component

                public function attachBehaviors($behaviors)
{
    $this->ensureBehaviors();
    foreach ($behaviors as $name => $behavior) {
        $this->attachBehaviorInternal($name, $behavior);
    }
}

            
behaviors() public method

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

Returns a list of behaviors that this component should behave as.

Child classes may override this method to specify the behaviors they want to behave as.

The return value of this method should be an array of behavior objects or configurations indexed by behavior names. A behavior configuration can be either a string specifying the behavior class or an array of the following structure:

'behaviorName' => [
    'class' => 'BehaviorClass',
    'property1' => 'value1',
    'property2' => 'value2',
]

Note that a behavior class must extend from yii\base\Behavior. Behaviors can be attached using a name or anonymously. When a name is used as the array key, using this name, the behavior can later be retrieved using getBehavior() or be detached using detachBehavior(). Anonymous behaviors can not be retrieved or detached.

Behaviors declared in this method will be attached to the component automatically (on demand).

public array behaviors ( )
return array

The behavior configurations.

                public function behaviors()
{
    return [];
}

            
calculateTimings() public method

Calculates the elapsed time for the given log messages.

public array calculateTimings ( $messages )
$messages array

The log messages obtained from profiling

return array

Timings. Each element is an array consisting of these elements: info, category, timestamp, trace, level, duration, memory, memoryDiff. The memory and memoryDiff values are available since version 2.0.11.

                public function calculateTimings($messages)
{
    $timings = [];
    $stack = [];
    foreach ($messages as $i => $log) {
        list($token, $level, $category, $timestamp, $traces) = $log;
        $memory = isset($log[5]) ? $log[5] : 0;
        $log[6] = $i;
        $hash = md5(json_encode($token));
        if ($level == self::LEVEL_PROFILE_BEGIN) {
            $stack[$hash] = $log;
        } elseif ($level == self::LEVEL_PROFILE_END) {
            if (isset($stack[$hash])) {
                $timings[$stack[$hash][6]] = [
                    'info' => $stack[$hash][0],
                    'category' => $stack[$hash][2],
                    'timestamp' => $stack[$hash][3],
                    'trace' => $stack[$hash][4],
                    'level' => count($stack) - 1,
                    'duration' => $timestamp - $stack[$hash][3],
                    'memory' => $memory,
                    'memoryDiff' => $memory - (isset($stack[$hash][5]) ? $stack[$hash][5] : 0),
                ];
                unset($stack[$hash]);
            }
        }
    }
    ksort($timings);
    return array_values($timings);
}

            
canGetProperty() public method

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

Returns a value indicating whether a property can be read.

A property can be read if:

  • the class has a getter 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 readable property of the given name (when $checkBehaviors is true).

See also canSetProperty().

public boolean canGetProperty ( $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 read

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

            
canSetProperty() public method

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

Returns a value indicating whether a property can be set.

A property can be written if:

  • the class has a 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 writable property of the given name (when $checkBehaviors is true).

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

                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;
}

            
className() public static method
Deprecated since 2.0.14. On PHP >=5.5, use ::class instead.

Defined in: yii\base\BaseObject::className()

Returns the fully qualified name of this class.

public static string className ( )
return string

The fully qualified name of this class.

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

            
detachBehavior() public method

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

Detaches a behavior from the component.

The behavior's yii\base\Behavior::detach() method will be invoked.

public yii\base\Behavior|null detachBehavior ( $name )
$name string

The behavior's name.

return yii\base\Behavior|null

The detached behavior. Null if the behavior does not exist.

                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;
}

            
detachBehaviors() public method

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

Detaches all behaviors from the component.

public void detachBehaviors ( )

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

            
ensureBehaviors() public method

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

Makes sure that the behaviors declared in behaviors() are attached to this component.

public void ensureBehaviors ( )

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

            
flush() public method

Flushes log messages from memory to targets.

public void flush ( $final false )
$final boolean

Whether this is a final call during a request.

                public function flush($final = false)
{
    if ($this->profilingAware) {
        $keep = [];
        $messages = [];
        foreach ($this->messages as $index => $message) {
            if (is_int($index)) {
                $messages[] = $message;
            } else {
                if (strncmp($index, 'begin-', 6) === 0) {
                    $oppositeProfile = 'end-' . substr($index, 6);
                } else {
                    $oppositeProfile = 'begin-' . substr($index, 4);
                }
                if (array_key_exists($oppositeProfile, $this->messages)) {
                    $messages[] = $message;
                } else {
                    $keep[$index] = $message;
                }
            }
        }
        if ($this->flushInterval > 0 && count($keep) >= $this->flushInterval) {
            $this->messages = [];
            $this->log(
                'Number of dangling profiling block messages reached flushInterval value and therefore these were flushed. Please consider setting higher flushInterval value or making profiling blocks shorter.',
                self::LEVEL_WARNING
            );
            $messages = array_merge($messages, array_values($keep));
        } else {
            $this->messages = $keep;
        }
    } else {
        $messages = $this->messages;
        $this->messages = [];
    }
    if ($this->dispatcher instanceof Dispatcher) {
        $this->dispatcher->dispatch($messages, $final);
    }
}

            
getBehavior() public method

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

Returns the named behavior object.

public yii\base\Behavior|null getBehavior ( $name )
$name string

The behavior name

return yii\base\Behavior|null

The behavior object, or null if the behavior does not exist

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

            
getBehaviors() public method

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

Returns all behaviors attached to this component.

public yii\base\Behavior[] getBehaviors ( )
return yii\base\Behavior[]

List of behaviors attached to this component

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

            
getDbProfiling() public method

Returns the statistical results of DB queries.

The results returned include the number of SQL statements executed and the total time spent.

public array getDbProfiling ( )
return array

The first element indicates the number of SQL statements executed, and the second element the total time spent in SQL execution.

                public function getDbProfiling()
{
    $timings = $this->getProfiling($this->dbEventNames);
    $count = count($timings);
    $time = 0;
    foreach ($timings as $timing) {
        $time += $timing['duration'];
    }
    return [$count, $time];
}

            
getElapsedTime() public method

Returns the total elapsed time since the start of the current request.

This method calculates the difference between now and the timestamp defined by constant YII_BEGIN_TIME which is evaluated at the beginning of yii\BaseYii class file.

public float getElapsedTime ( )
return float

The total elapsed time in seconds for current request.

                public function getElapsedTime()
{
    return microtime(true) - YII_BEGIN_TIME;
}

            
getLevelName() public static method

Returns the text display of the specified level.

public static string getLevelName ( $level )
$level integer

The message level, e.g. LEVEL_ERROR, LEVEL_WARNING.

return string

The text display of the level

                public static function getLevelName($level)
{
    static $levels = [
        self::LEVEL_ERROR => 'error',
        self::LEVEL_WARNING => 'warning',
        self::LEVEL_INFO => 'info',
        self::LEVEL_TRACE => 'trace',
        self::LEVEL_PROFILE_BEGIN => 'profile begin',
        self::LEVEL_PROFILE_END => 'profile end',
        self::LEVEL_PROFILE => 'profile',
    ];
    return isset($levels[$level]) ? $levels[$level] : 'unknown';
}

            
getProfiling() public method

Returns the profiling results.

By default, all profiling results will be returned. You may provide $categories and $excludeCategories as parameters to retrieve the results that you are interested in.

public array getProfiling ( $categories = [], $excludeCategories = [] )
$categories array

List of categories that you are interested in. You can use an asterisk at the end of a category to do a prefix match. For example, 'yii\db*' will match categories starting with 'yii\db\', such as 'yii\db\Connection'.

$excludeCategories array

List of categories that you want to exclude

return array

The profiling results. Each element is an array consisting of these elements: info, category, timestamp, trace, level, duration, memory, memoryDiff. The memory and memoryDiff values are available since version 2.0.11.

                public function getProfiling($categories = [], $excludeCategories = [])
{
    $timings = $this->calculateTimings($this->messages);
    if (empty($categories) && empty($excludeCategories)) {
        return $timings;
    }
    foreach ($timings as $outerIndex => $outerTimingItem) {
        $currentIndex = $outerIndex;
        $matched = empty($categories);
        foreach ($categories as $category) {
            $prefix = rtrim($category, '*');
            if (
                ($outerTimingItem['category'] === $category || $prefix !== $category)
                && strpos($outerTimingItem['category'], $prefix) === 0
            ) {
                $matched = true;
                break;
            }
        }
        if ($matched) {
            foreach ($excludeCategories as $category) {
                $prefix = rtrim($category, '*');
                foreach ($timings as $innerIndex => $innerTimingItem) {
                    $currentIndex = $innerIndex;
                    if (
                        ($innerTimingItem['category'] === $category || $prefix !== $category)
                        && strpos($innerTimingItem['category'], $prefix) === 0
                    ) {
                        $matched = false;
                        break;
                    }
                }
            }
        }
        if (!$matched) {
            unset($timings[$currentIndex]);
        }
    }
    return array_values($timings);
}

            
hasEventHandlers() public method

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

Returns a value indicating whether there is any handler attached to the named event.

public boolean hasEventHandlers ( $name )
$name string

The event name

return boolean

Whether there is any handler attached to the event.

                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);
}

            
hasMethod() public method

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

                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;
}

            
hasProperty() public method

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).

See also:

public boolean hasProperty ( $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 is defined

                public function hasProperty($name, $checkVars = true, $checkBehaviors = true)
{
    return $this->canGetProperty($name, $checkVars, $checkBehaviors) || $this->canSetProperty($name, false, $checkBehaviors);
}

            
init() public method

Initializes the logger by registering flush() as a shutdown function.

public void init ( )

                public function init()
{
    parent::init();
    register_shutdown_function(function () {
        // make regular flush before other shutdown functions, which allows session data collection and so on
        $this->flush();
        // make sure log entries written by shutdown functions are also flushed
        // ensure "flush()" is called last when there are multiple shutdown functions
        register_shutdown_function([$this, 'flush'], true);
    });
}

            
log() public method

Logs a message with the given type and category.

If $traceLevel is greater than 0, additional call stack information about the application code will be logged as well.

public void log ( $message, $level, $category 'application' )
$message string|array

The message to be logged. This can be a simple string or a more complex data structure that will be handled by a log target.

$level integer

The level of the message. This must be one of the following: Logger::LEVEL_ERROR, Logger::LEVEL_WARNING, Logger::LEVEL_INFO, Logger::LEVEL_TRACE, Logger::LEVEL_PROFILE, Logger::LEVEL_PROFILE_BEGIN, Logger::LEVEL_PROFILE_END.

$category string

The category of the message.

                public function log($message, $level, $category = 'application')
{
    $time = microtime(true);
    $traces = [];
    if ($this->traceLevel > 0) {
        $count = 0;
        $ts = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
        array_pop($ts); // remove the last trace since it would be the entry script, not very useful
        foreach ($ts as $trace) {
            if (isset($trace['file'], $trace['line']) && strpos($trace['file'], YII2_PATH) !== 0) {
                unset($trace['object'], $trace['args']);
                $traces[] = $trace;
                if (++$count >= $this->traceLevel) {
                    break;
                }
            }
        }
    }
    $data = [$message, $level, $category, $time, $traces, memory_get_usage()];
    if ($this->profilingAware && in_array($level, [self::LEVEL_PROFILE_BEGIN, self::LEVEL_PROFILE_END])) {
        $this->messages[($level == self::LEVEL_PROFILE_BEGIN ? 'begin-' : 'end-') . md5(json_encode($message))] = $data;
    } else {
        $this->messages[] = $data;
    }
    if ($this->flushInterval > 0 && count($this->messages) >= $this->flushInterval) {
        $this->flush();
    }
}

            
off() public method

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

Detaches an existing event handler from this component.

This method is the opposite of on().

Note: in case wildcard pattern is passed for event name, only the handlers registered with this wildcard will be removed, while handlers registered with plain names matching this wildcard will remain.

See also on().

public boolean off ( $name, $handler null )
$name string

Event name

$handler callable|null

The event handler to be removed. If it is null, all handlers attached to the named event will be removed.

return boolean

If a handler is found and detached

                public function off($name, $handler = null)
{
    $this->ensureBehaviors();
    if (empty($this->_events[$name]) && empty($this->_eventWildcards[$name])) {
        return false;
    }
    if ($handler === null) {
        unset($this->_events[$name], $this->_eventWildcards[$name]);
        return true;
    }
    $removed = false;
    // plain event names
    if (isset($this->_events[$name])) {
        foreach ($this->_events[$name] as $i => $event) {
            if ($event[0] === $handler) {
                unset($this->_events[$name][$i]);
                $removed = true;
            }
        }
        if ($removed) {
            $this->_events[$name] = array_values($this->_events[$name]);
            return true;
        }
    }
    // wildcard event names
    if (isset($this->_eventWildcards[$name])) {
        foreach ($this->_eventWildcards[$name] as $i => $event) {
            if ($event[0] === $handler) {
                unset($this->_eventWildcards[$name][$i]);
                $removed = true;
            }
        }
        if ($removed) {
            $this->_eventWildcards[$name] = array_values($this->_eventWildcards[$name]);
            // remove empty wildcards to save future redundant regex checks:
            if (empty($this->_eventWildcards[$name])) {
                unset($this->_eventWildcards[$name]);
            }
        }
    }
    return $removed;
}

            
on() public method

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

Attaches an event handler to an event.

The event handler must be a valid PHP callback. The following are some examples:

function ($event) { ... }         // anonymous function
[$object, 'handleClick']          // $object->handleClick()
['Page', 'handleClick']           // Page::handleClick()
'handleClick'                     // global function handleClick()

The event handler must be defined with the following signature,

function ($event)

where $event is an yii\base\Event object which includes parameters associated with the event.

Since 2.0.14 you can specify event name as a wildcard pattern:

$component->on('event.group.*', function ($event) {
    Yii::trace($event->name . ' is triggered.');
});

See also off().

public void on ( $name, $handler, $data null, $append true )
$name string

The event name

$handler callable

The event handler

$data mixed

The data to be passed to the event handler when the event is triggered. When the event handler is invoked, this data can be accessed via yii\base\Event::$data.

$append boolean

Whether to append new event handler to the end of the existing handler list. If false, the new handler will be inserted at the beginning of the existing handler list.

                public function on($name, $handler, $data = null, $append = true)
{
    $this->ensureBehaviors();
    if (strpos($name, '*') !== false) {
        if ($append || empty($this->_eventWildcards[$name])) {
            $this->_eventWildcards[$name][] = [$handler, $data];
        } else {
            array_unshift($this->_eventWildcards[$name], [$handler, $data]);
        }
        return;
    }
    if ($append || empty($this->_events[$name])) {
        $this->_events[$name][] = [$handler, $data];
    } else {
        array_unshift($this->_events[$name], [$handler, $data]);
    }
}

            
trigger() public method

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

Triggers an event.

This method represents the happening of an event. It invokes all attached handlers for the event including class-level handlers.

public void trigger ( $name, yii\base\Event $event null )
$name string

The event name

$event yii\base\Event|null

The event instance. If not set, a default yii\base\Event object will be created.

                public function trigger($name, Event $event = null)
{
    $this->ensureBehaviors();
    $eventHandlers = [];
    foreach ($this->_eventWildcards as $wildcard => $handlers) {
        if (StringHelper::matchWildcard($wildcard, $name)) {
            $eventHandlers[] = $handlers;
        }
    }
    if (!empty($this->_events[$name])) {
        $eventHandlers[] = $this->_events[$name];
    }
    if (!empty($eventHandlers)) {
        $eventHandlers = call_user_func_array('array_merge', $eventHandlers);
        if ($event === null) {
            $event = new Event();
        }
        if ($event->sender === null) {
            $event->sender = $this;
        }
        $event->handled = false;
        $event->name = $name;
        foreach ($eventHandlers as $handler) {
            $event->data = $handler[1];
            call_user_func($handler[0], $event);
            // stop further handling if the event is handled
            if ($event->handled) {
                return;
            }
        }
    }
    // invoke class-level attached handlers
    Event::trigger($this, $name, $event);
}