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Class yii\web\ErrorHandler

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Inheritance	yii\web\ErrorHandler » yii\base\ErrorHandler » yii\base\Component » yii\base\BaseObject
Implements	yii\base\Configurable
Available since version	2.0
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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Property	Type	Description	Defined By
$behaviors	yii\base\Behavior[]	List of behaviors attached to this component. This property is read-only.	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
$silentExitOnException	boolean	If true - `handleException()` will finish script with `ExitCode::OK`.	yii\base\ErrorHandler
$traceLine	string	Trace line with placeholders to be be substituted.	yii\web\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
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\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
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\Component
hasProperty()	Returns a value indicating whether a property is defined for this component.	yii\base\Component
htmlEncode()	Converts special characters to HTML entities.	yii\web\ErrorHandler
init()		yii\base\ErrorHandler
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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Method	Description	Defined 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'].

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\|null getExceptionName ( $exception )
$exception	Exception
return	string\|null	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.

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.

public string htmlEncode ( $text )
$text	string	To encode.
return	string	Encoded original text.

public boolean isCoreFile ( $file )
$file	string	Name to be checked.
return	boolean	Whether given name of the file belongs to the framework.

public string renderCallStack ( $exception )
$exception	Exception\|ParseError	Exception to get call stack from
return	string	HTML content of the rendered call stack.

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.

protected void renderException ( $exception )
$exception	Exception\|Error	The exception to be rendered.

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

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.

public string renderRequest ( )
return	string	The rendering result

protected boolean shouldRenderSimpleHtml ( )
return	boolean	If simple HTML should be rendered