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Class yii\console\ErrorHandler

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

ErrorHandler handles uncaught PHP errors and exceptions.

ErrorHandler is configured as an application component in yii\base\Application by default. You can access that instance via Yii::$app->errorHandler.

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
$discardExistingOutput boolean Whether to discard any existing page output before error display. yii\base\ErrorHandler
$exception Throwable|null The exception that is being handled currently. yii\base\ErrorHandler
$memoryReserveSize integer The size of the reserved memory. yii\base\ErrorHandler
$silentExitOnException boolean If true - handleException() will finish script with ExitCode::OK. yii\base\ErrorHandler

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
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
clearOutput() Removes all output echoed before calling this method. yii\base\ErrorHandler
convertExceptionToError() Converts an exception into a PHP error. yii\base\ErrorHandler
convertExceptionToString() Converts an exception into a simple string. yii\base\ErrorHandler
convertExceptionToVerboseString() Converts an exception into a string that has verbose information about the exception and its trace. yii\base\ErrorHandler
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
getBehavior() Returns the named behavior object. yii\base\Component
getBehaviors() Returns all behaviors attached to this component. yii\base\Component
handleError() Handles PHP execution errors such as warnings and notices. yii\base\ErrorHandler
handleException() Handles uncaught PHP exceptions. yii\base\ErrorHandler
handleFatalError() Handles fatal PHP errors. yii\base\ErrorHandler
handleHhvmError() Handles HHVM execution errors such as warnings and notices. yii\base\ErrorHandler
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() yii\base\ErrorHandler
logException() Logs the given exception. yii\base\ErrorHandler
off() Detaches an existing event handler from this component. yii\base\Component
on() Attaches an event handler to an event. yii\base\Component
register() Register this error handler. yii\base\ErrorHandler
trigger() Triggers an event. yii\base\Component
unregister() Unregisters this error handler by restoring the PHP error and exception handlers. yii\base\ErrorHandler

Protected Methods

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Method Description Defined By
formatMessage() Colorizes a message for console output. yii\console\ErrorHandler
handleFallbackExceptionMessage() Handles exception thrown during exception processing in handleException(). yii\base\ErrorHandler
renderException() Renders an exception using ansi format for console output. yii\console\ErrorHandler

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 [];
}

            
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();
}

            
clearOutput() public method

Defined in: yii\base\ErrorHandler::clearOutput()

Removes all output echoed before calling this method.

public void clearOutput ( )

                public function clearOutput()
{
    // the following manual level counting is to deal with zlib.output_compression set to On
    for ($level = ob_get_level(); $level > 0; --$level) {
        if (!@ob_end_clean()) {
            ob_clean();
        }
    }
}

            
convertExceptionToError() public static method

Defined in: yii\base\ErrorHandler::convertExceptionToError()

Converts an exception into a PHP error.

This method can be used to convert exceptions inside of methods like __toString() to PHP errors because exceptions cannot be thrown inside of them.

public static void convertExceptionToError ( $exception )
$exception Throwable

The exception to convert to a PHP error.

                public static function convertExceptionToError($exception)
{
    trigger_error(static::convertExceptionToString($exception), E_USER_ERROR);
}

            
convertExceptionToString() public static method

Defined in: yii\base\ErrorHandler::convertExceptionToString()

Converts an exception into a simple string.

public static string convertExceptionToString ( $exception )
$exception Throwable

The exception being converted

return string

The string representation of the exception.

                public static function convertExceptionToString($exception)
{
    if ($exception instanceof UserException) {
        return "{$exception->getName()}: {$exception->getMessage()}";
    }
    if (YII_DEBUG) {
        return static::convertExceptionToVerboseString($exception);
    }
    return 'An internal server error occurred.';
}

            
convertExceptionToVerboseString() public static method (available since version 2.0.14)

Defined in: yii\base\ErrorHandler::convertExceptionToVerboseString()

Converts an exception into a string that has verbose information about the exception and its trace.

public static string convertExceptionToVerboseString ( $exception )
$exception Throwable

The exception being converted

return string

The string representation of the exception.

                public static function convertExceptionToVerboseString($exception)
{
    if ($exception instanceof Exception) {
        $message = "Exception ({$exception->getName()})";
    } elseif ($exception instanceof ErrorException) {
        $message = (string)$exception->getName();
    } else {
        $message = 'Exception';
    }
    $message .= " '" . get_class($exception) . "' with message '{$exception->getMessage()}' \n\nin "
        . $exception->getFile() . ':' . $exception->getLine() . "\n\n"
        . "Stack trace:\n" . $exception->getTraceAsString();
    return $message;
}

            
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);
        }
    }
}

            
formatMessage() protected method

Colorizes a message for console output.

See also yii\helpers\Console::ansiFormat() for details on how to specify the message format.

protected string formatMessage ( $message, $format = [Console::FG_REDConsole::BOLD] )
$message string

The message to colorize.

$format array

The message format.

return string

The colorized message.

                protected function formatMessage($message, $format = [Console::FG_RED, Console::BOLD])
{
    $stream = (PHP_SAPI === 'cli') ? \STDERR : \STDOUT;
    // try controller first to allow check for --color switch
    if (Yii::$app->controller instanceof \yii\console\Controller && Yii::$app->controller->isColorEnabled($stream)
        || Yii::$app instanceof \yii\console\Application && Console::streamSupportsAnsiColors($stream)) {
        $message = Console::ansiFormat($message, $format);
    }
    return $message;
}

            
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;
}

            
handleError() public method

Defined in: yii\base\ErrorHandler::handleError()

Handles PHP execution errors such as warnings and notices.

This method is used as a PHP error handler. It will simply raise an yii\base\ErrorException.

public boolean handleError ( $code, $message, $file, $line )
$code integer

The level of the error raised.

$message string

The error message.

$file string

The filename that the error was raised in.

$line integer

The line number the error was raised at.

return boolean

Whether the normal error handler continues.

throws yii\base\ErrorException

                public function handleError($code, $message, $file, $line)
{
    if (error_reporting() & $code) {
        // load ErrorException manually here because autoloading them will not work
        // when error occurs while autoloading a class
        if (!class_exists('yii\\base\\ErrorException', false)) {
            require_once __DIR__ . '/ErrorException.php';
        }
        $exception = new ErrorException($message, $code, $code, $file, $line);
        if (PHP_VERSION_ID < 70400) {
            // prior to PHP 7.4 we can't throw exceptions inside of __toString() - it will result a fatal error
            $trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
            array_shift($trace);
            foreach ($trace as $frame) {
                if ($frame['function'] === '__toString') {
                    $this->handleException($exception);
                    if (defined('HHVM_VERSION')) {
                        flush();
                    }
                    exit(1);
                }
            }
        }
        throw $exception;
    }
    return false;
}

            
handleException() public method

Defined in: yii\base\ErrorHandler::handleException()

Handles uncaught PHP exceptions.

This method is implemented as a PHP exception handler.

public void handleException ( $exception )
$exception Throwable

The exception that is not caught

                public function handleException($exception)
{
    if ($exception instanceof ExitException) {
        return;
    }
    $this->exception = $exception;
    // disable error capturing to avoid recursive errors while handling exceptions
    $this->unregister();
    // set preventive HTTP status code to 500 in case error handling somehow fails and headers are sent
    // HTTP exceptions will override this value in renderException()
    if (PHP_SAPI !== 'cli') {
        http_response_code(500);
    }
    try {
        $this->logException($exception);
        if ($this->discardExistingOutput) {
            $this->clearOutput();
        }
        $this->renderException($exception);
        if (!$this->silentExitOnException) {
            \Yii::getLogger()->flush(true);
            if (defined('HHVM_VERSION')) {
                flush();
            }
            exit(1);
        }
    } catch (\Exception $e) {
        // an other exception could be thrown while displaying the exception
        $this->handleFallbackExceptionMessage($e, $exception);
    } catch (\Throwable $e) {
        // additional check for \Throwable introduced in PHP 7
        $this->handleFallbackExceptionMessage($e, $exception);
    }
    $this->exception = null;
}

            
handleFallbackExceptionMessage() protected method (available since version 2.0.11)

Defined in: yii\base\ErrorHandler::handleFallbackExceptionMessage()

Handles exception thrown during exception processing in handleException().

protected void handleFallbackExceptionMessage ( $exception, $previousException )
$exception Throwable

Exception that was thrown during main exception processing.

$previousException Throwable

Main exception processed in handleException().

                protected function handleFallbackExceptionMessage($exception, $previousException)
{
    $msg = "An Error occurred while handling another error:\n";
    $msg .= (string) $exception;
    $msg .= "\nPrevious exception:\n";
    $msg .= (string) $previousException;
    if (YII_DEBUG) {
        if (PHP_SAPI === 'cli') {
            echo $msg . "\n";
        } else {
            echo '<pre>' . htmlspecialchars($msg, ENT_QUOTES, Yii::$app->charset) . '</pre>';
        }
        $msg .= "\n\$_SERVER = " . VarDumper::export($_SERVER);
    } else {
        echo 'An internal server error occurred.';
    }
    error_log($msg);
    if (defined('HHVM_VERSION')) {
        flush();
    }
    exit(1);
}

            
handleFatalError() public method

Defined in: yii\base\ErrorHandler::handleFatalError()

Handles fatal PHP errors.

public void handleFatalError ( )

                public function handleFatalError()
{
    unset($this->_memoryReserve);
    // load ErrorException manually here because autoloading them will not work
    // when error occurs while autoloading a class
    if (!class_exists('yii\\base\\ErrorException', false)) {
        require_once __DIR__ . '/ErrorException.php';
    }
    $error = error_get_last();
    if (ErrorException::isFatalError($error)) {
        if (!empty($this->_hhvmException)) {
            $exception = $this->_hhvmException;
        } else {
            $exception = new ErrorException($error['message'], $error['type'], $error['type'], $error['file'], $error['line']);
        }
        $this->exception = $exception;
        $this->logException($exception);
        if ($this->discardExistingOutput) {
            $this->clearOutput();
        }
        $this->renderException($exception);
        // need to explicitly flush logs because exit() next will terminate the app immediately
        Yii::getLogger()->flush(true);
        if (defined('HHVM_VERSION')) {
            flush();
        }
        exit(1);
    }
}

            
handleHhvmError() public method (available since version 2.0.6)

Defined in: yii\base\ErrorHandler::handleHhvmError()

Handles HHVM execution errors such as warnings and notices.

This method is used as a HHVM error handler. It will store exception that will be used in fatal error handler

public boolean handleHhvmError ( $code, $message, $file, $line, $context, $backtrace )
$code integer

The level of the error raised.

$message string

The error message.

$file string

The filename that the error was raised in.

$line integer

The line number the error was raised at.

$context mixed
$backtrace mixed

Trace of error

return boolean

Whether the normal error handler continues.

throws yii\base\ErrorException

                public function handleHhvmError($code, $message, $file, $line, $context, $backtrace)
{
    if ($this->handleError($code, $message, $file, $line)) {
        return true;
    }
    if (E_ERROR & $code) {
        $exception = new ErrorException($message, $code, $code, $file, $line);
        $ref = new \ReflectionProperty('\Exception', 'trace');
        $ref->setAccessible(true);
        $ref->setValue($exception, $backtrace);
        $this->_hhvmException = $exception;
    }
    return false;
}

            
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
public void init ( )

                public function init()
{
    $this->silentExitOnException = $this->silentExitOnException !== null ? $this->silentExitOnException : YII_ENV_TEST;
    parent::init();
}

            
logException() public method

Defined in: yii\base\ErrorHandler::logException()

Logs the given exception.

public void logException ( $exception )
$exception Throwable

The exception to be logged

Version Description
2.0.3 this method is now public.

                public function logException($exception)
{
    $category = get_class($exception);
    if ($exception instanceof HttpException) {
        $category = 'yii\\web\\HttpException:' . $exception->statusCode;
    } elseif ($exception instanceof \ErrorException) {
        $category .= ':' . $exception->getSeverity();
    }
    Yii::error($exception, $category);
}

            
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]);
    }
}

            
register() public method

Defined in: yii\base\ErrorHandler::register()

Register this error handler.

public void register ( )
Version Description
2.0.32 this will not do anything if the error handler was already registered

                public function register()
{
    if (!$this->_registered) {
        ini_set('display_errors', false);
        set_exception_handler([$this, 'handleException']);
        if (defined('HHVM_VERSION')) {
            set_error_handler([$this, 'handleHhvmError']);
        } else {
            set_error_handler([$this, 'handleError']);
        }
        if ($this->memoryReserveSize > 0) {
            $this->_memoryReserve = str_repeat('x', $this->memoryReserveSize);
        }
        register_shutdown_function([$this, 'handleFatalError']);
        $this->_registered = true;
    }
}

            
renderException() protected method

Renders an exception using ansi format for console output.

protected void renderException ( $exception )
$exception Throwable

The exception to be rendered.

                protected function renderException($exception)
{
    $previous = $exception->getPrevious();
    if ($exception instanceof UnknownCommandException) {
        // display message and suggest alternatives in case of unknown command
        $message = $this->formatMessage($exception->getName() . ': ') . $exception->command;
        $alternatives = $exception->getSuggestedAlternatives();
        if (count($alternatives) === 1) {
            $message .= "\n\nDid you mean \"" . reset($alternatives) . '"?';
        } elseif (count($alternatives) > 1) {
            $message .= "\n\nDid you mean one of these?\n    - " . implode("\n    - ", $alternatives);
        }
    } elseif ($exception instanceof UserException && ($exception instanceof Exception || !YII_DEBUG)) {
        $message = $this->formatMessage($exception->getName() . ': ') . $exception->getMessage();
    } elseif (YII_DEBUG) {
        if ($exception instanceof Exception) {
            $message = $this->formatMessage("Exception ({$exception->getName()})");
        } elseif ($exception instanceof ErrorException) {
            $message = $this->formatMessage($exception->getName());
        } else {
            $message = $this->formatMessage('Exception');
        }
        $message .= $this->formatMessage(" '" . get_class($exception) . "'", [Console::BOLD, Console::FG_BLUE])
            . ' with message ' . $this->formatMessage("'{$exception->getMessage()}'", [Console::BOLD]) //. "\n"
            . "\n\nin " . dirname($exception->getFile()) . DIRECTORY_SEPARATOR . $this->formatMessage(basename($exception->getFile()), [Console::BOLD])
            . ':' . $this->formatMessage($exception->getLine(), [Console::BOLD, Console::FG_YELLOW]) . "\n";
        if ($exception instanceof \yii\db\Exception && !empty($exception->errorInfo)) {
            $message .= "\n" . $this->formatMessage("Error Info:\n", [Console::BOLD]) . print_r($exception->errorInfo, true);
        }
        if ($previous === null) {
            $message .= "\n" . $this->formatMessage("Stack trace:\n", [Console::BOLD]) . $exception->getTraceAsString();
        }
    } else {
        $message = $this->formatMessage('Error: ') . $exception->getMessage();
    }
    if (PHP_SAPI === 'cli') {
        Console::stderr($message . "\n");
    } else {
        echo $message . "\n";
    }
    if (YII_DEBUG && $previous !== null) {
        $causedBy = $this->formatMessage('Caused by: ', [Console::BOLD]);
        if (PHP_SAPI === 'cli') {
            Console::stderr($causedBy);
        } else {
            echo $causedBy;
        }
        $this->renderException($previous);
    }
}

            
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);
}

            
unregister() public method

Defined in: yii\base\ErrorHandler::unregister()

Unregisters this error handler by restoring the PHP error and exception handlers.

public void unregister ( )
Version Description
2.0.32 this will not do anything if the error handler was not registered

                public function unregister()
{
    if ($this->_registered) {
        restore_error_handler();
        restore_exception_handler();
        $this->_registered = false;
    }
}