Class yii\web\ErrorHandler

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

ErrorHandler handles uncaught PHP errors and exceptions.

ErrorHandler displays these errors using appropriate views based on the nature of the errors and the mode the application runs at.

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

For more details and usage information on ErrorHandler, see the guide article on handling errors.

Public Properties

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PropertyTypeDescriptionDefined By
$behaviors yii\base\Behavior[] List of behaviors attached to this component yii\base\Component
$callStackItemView string The path of the view file for rendering exceptions and errors call stack element. yii\web\ErrorHandler
$discardExistingOutput boolean Whether to discard any existing page output before error display. yii\base\ErrorHandler
$displayVars array List of the PHP predefined variables that should be displayed on the error page. yii\web\ErrorHandler
$errorAction string The route (e.g. site/error) to the controller action that will be used to display external errors. yii\web\ErrorHandler
$errorView string The path of the view file for rendering exceptions without call stack information. yii\web\ErrorHandler
$exception Exception|null The exception that is being handled currently. yii\base\ErrorHandler
$exceptionView string The path of the view file for rendering exceptions. yii\web\ErrorHandler
$maxSourceLines integer Maximum number of source code lines to be displayed. yii\web\ErrorHandler
$maxTraceSourceLines integer Maximum number of trace source code lines to be displayed. yii\web\ErrorHandler
$memoryReserveSize integer The size of the reserved memory. yii\base\ErrorHandler
$previousExceptionView string The path of the view file for rendering previous exceptions. yii\web\ErrorHandler

Public Methods

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MethodDescriptionDefined By
__call() Calls the named method which is not a class method. yii\base\Object
__clone() This method is called after the object is created by cloning an existing one. yii\base\Component
__construct() Constructor. yii\base\Object
__get() Returns the value of an object property. yii\base\Object
__isset() Checks if a property is set, i.e. defined and not null. yii\base\Object
__set() Sets value of an object property. yii\base\Object
__unset() Sets an object property to null. yii\base\Object
addTypeLinks() Adds informational links to the given PHP type/class. yii\web\ErrorHandler
argumentsToString() Converts arguments array to its string representation yii\web\ErrorHandler
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\Object
canSetProperty() Returns a value indicating whether a property can be set. yii\base\Object
className() Returns the fully qualified name of this class. yii\base\Object
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
createFrameworkVersionLink() Creates string containing HTML link which refers to the page with the current version of the framework and version number text. yii\web\ErrorHandler
createHttpStatusLink() Creates HTML containing link to the page with the information on given HTTP status code. yii\web\ErrorHandler
createServerInformationLink() Creates string containing HTML link which refers to the home page of determined web-server software and its full name. yii\web\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
getExceptionName() Returns human-readable exception name yii\web\ErrorHandler
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\Object
hasProperty() Returns a value indicating whether a property is defined. yii\base\Object
htmlEncode() Converts special characters to HTML entities. yii\web\ErrorHandler
init() Initializes the object. yii\base\Object
isCoreFile() Determines whether given name of the file belongs to the framework. yii\web\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
renderCallStack() Renders call stack. yii\web\ErrorHandler
renderCallStackItem() Renders a single call stack element. yii\web\ErrorHandler
renderFile() Renders a view file as a PHP script. yii\web\ErrorHandler
renderPreviousExceptions() Renders the previous exception stack for a given Exception. yii\web\ErrorHandler
renderRequest() Renders the global variables of the request. yii\web\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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MethodDescriptionDefined By
convertExceptionToArray() Converts an exception into an array. yii\web\ErrorHandler
getTypeUrl() Returns the informational link URL for a given PHP type/class. yii\web\ErrorHandler
handleFallbackExceptionMessage() Handles exception thrown during exception processing in handleException(). yii\base\ErrorHandler
renderException() Renders the exception. yii\web\ErrorHandler
shouldRenderSimpleHtml() yii\web\ErrorHandler

Property Details

$callStackItemView public property

The path of the view file for rendering exceptions and errors call stack element.

public string $callStackItemView '@yii/views/errorHandler/callStackItem.php'
$displayVars public property (available since version 2.0.7)

List of the PHP predefined variables that should be displayed on the error page. Note that a variable must be accessible via $GLOBALS. Otherwise it won't be displayed. Defaults to ['_GET', '_POST', '_FILES', '_COOKIE', '_SESSION'].

See also renderRequest().

public array $displayVars = ['_GET''_POST''_FILES''_COOKIE''_SESSION']
$errorAction public property

The route (e.g. site/error) to the controller action that will be used to display external errors. Inside the action, it can retrieve the error information using Yii::$app->errorHandler->exception. This property defaults to null, meaning ErrorHandler will handle the error display.

public string $errorAction null
$errorView public property

The path of the view file for rendering exceptions without call stack information.

public string $errorView '@yii/views/errorHandler/error.php'
$exceptionView public property

The path of the view file for rendering exceptions.

public string $exceptionView '@yii/views/errorHandler/exception.php'
$maxSourceLines public property

Maximum number of source code lines to be displayed. Defaults to 19.

$maxTraceSourceLines public property

Maximum number of trace source code lines to be displayed. Defaults to 13.

$previousExceptionView public property

The path of the view file for rendering previous exceptions.

public string $previousExceptionView '@yii/views/errorHandler/previousException.php'

Method Details

addTypeLinks() public method

Adds informational links to the given PHP type/class.

public string addTypeLinks ( $code )
$code string

Type/class name to be linkified.

return string

Linkified with HTML type/class name.

argumentsToString() public method

Converts arguments array to its string representation

public string argumentsToString ( $args )
$args array

Arguments array to be converted

return string

String representation of the arguments array

convertExceptionToArray() protected method

Converts an exception into an array.

protected array convertExceptionToArray ( $exception )
$exception Exception|\Error

The exception being converted

return array

The array representation of the exception.

createFrameworkVersionLink() public method

Creates string containing HTML link which refers to the page with the current version of the framework and version number text.

public string createFrameworkVersionLink ( )
return string

Framework version information hyperlink.

createHttpStatusLink() public method

Creates HTML containing link to the page with the information on given HTTP status code.

public string createHttpStatusLink ( $statusCode, $statusDescription )
$statusCode integer

To be used to generate information link.

$statusDescription string

Description to display after the the status code.

return string

Generated HTML with HTTP status code information.

createServerInformationLink() public method

Creates string containing HTML link which refers to the home page of determined web-server software and its full name.

public string createServerInformationLink ( )
return string

Server software information hyperlink.

getExceptionName() public method

Returns human-readable exception name

public string getExceptionName ( $exception )
$exception Exception
return string

Human-readable exception name or null if it cannot be determined

getTypeUrl() protected method

Returns the informational link URL for a given PHP type/class.

See also addTypeLinks().

protected string|null getTypeUrl ( $class, $method )
$class string

The type or class name.

$method string|null

The method name.

return string|null

The informational link URL.

htmlEncode() public method

Converts special characters to HTML entities.

public string htmlEncode ( $text )
$text string

To encode.

return string

Encoded original text.

isCoreFile() public method

Determines whether given name of the file belongs to the framework.

public boolean isCoreFile ( $file )
$file string

Name to be checked.

return boolean

Whether given name of the file belongs to the framework.

renderCallStack() public method (available since version 2.0.12)

Renders call stack.

public string renderCallStack ( Exception $exception )
$exception Exception

Exception to get call stack from

return string

HTML content of the rendered call stack.

renderCallStackItem() public method

Renders a single call stack element.

public string renderCallStackItem ( $file, $line, $class, $method, $args, $index )
$file string|null

Name where call has happened.

$line integer|null

Number on which call has happened.

$class string|null

Called class name.

$method string|null

Called function/method name.

$args array

Array of method arguments.

$index integer

Number of the call stack element.

return string

HTML content of the rendered call stack element.

renderException() protected method

Renders the exception.

protected void renderException ( $exception )
$exception Exception|\Error

The exception to be rendered.

renderFile() public method

Renders a view file as a PHP script.

public string renderFile ( $_file_, $_params_ )
$_file_ string

The view file.

$_params_ array

The parameters (name-value pairs) that will be extracted and made available in the view file.

return string

The rendering result

renderPreviousExceptions() public method

Renders the previous exception stack for a given Exception.

public string renderPreviousExceptions ( $exception )
$exception Exception

The exception whose precursors should be rendered.

return string

HTML content of the rendered previous exceptions. Empty string if there are none.

renderRequest() public method

Renders the global variables of the request.

List of global variables is defined in $displayVars.

See also $displayVars.

public string renderRequest ( )
return string

The rendering result

shouldRenderSimpleHtml() protected method (available since version 2.0.12)

protected boolean shouldRenderSimpleHtml ( )
return boolean

If simple HTML should be rendered