Handler class for MWExceptions. More...

Static Public Member Functions
static	getLogContext (Throwable $e, $catcher=self::CAUGHT_BY_OTHER)
	Get a PSR-3 log event context from a Throwable.

static	getLogMessage (Throwable $e)
	Get a message formatting the throwable message and its origin.

static	getLogNormalMessage (Throwable $e)
	Get a normalised message for formatting with PSR-3 log event context.

static	getPublicLogMessage (Throwable $e)

static	getRedactedTrace (Throwable $e)
	Return a copy of a throwable's backtrace as an array.

static	getRedactedTraceAsString (Throwable $e)
	Generate a string representation of a throwable's stack trace.

static	getStructuredExceptionData (Throwable $e, $catcher=self::CAUGHT_BY_OTHER)
	Get a structured representation of a Throwable.

static	getURL ()
	If the exception occurred in the course of responding to a request, returns the requested URL.

static	handleError ( $level, $message, $file=null, $line=null)
	Handler for set_error_handler() callback notifications.

static	handleException (Throwable $e, $catcher=self::CAUGHT_BY_OTHER)
	Exception handler which simulates the appropriate catch() handling:

static	handleFatalError ()
	Callback used as a registered shutdown function.

static	handleUncaughtException (Throwable $e)
	Callback to use with PHP's set_exception_handler.

static	installHandler (bool $logExceptionBacktrace=true, bool $propagateErrors=true)
	Install handlers with PHP.

static	jsonSerializeException (Throwable $e, $pretty=false, $escaping=0, $catcher=self::CAUGHT_BY_OTHER)
	Serialize a Throwable object to JSON.

static	logException (Throwable $e, $catcher=self::CAUGHT_BY_OTHER, $extraData=[])
	Log a throwable to the exception log (if enabled).

static	prettyPrintTrace (array $trace, $pad='')
	Generate a string representation of a stacktrace.

static	redactTrace (array $trace)
	Redact a stacktrace generated by Throwable::getTrace(), debug_backtrace() or similar means.

static	rollbackPrimaryChangesAndLog (Throwable $e, $catcher=self::CAUGHT_BY_OTHER)
	Roll back any open database transactions and log the stack trace of the throwable.

Public Attributes
const	CAUGHT_BY_ENTRYPOINT = 'entrypoint'
	Error caught and reported by a script entry point.

const	CAUGHT_BY_HANDLER = 'mwe_handler'
	Error caught and reported by this exception handler.

const	CAUGHT_BY_OTHER = 'other'
	Error reported by direct logException() call.

Static Protected Member Functions
static	report (Throwable $e)
	Report a throwable to the user.

Static Protected Attributes
static string null	$reservedMemory

Detailed Description

Handler class for MWExceptions.

Definition at line 38 of file MWExceptionHandler.php.

Member Function Documentation

◆ getLogContext()

static MWExceptionHandler::getLogContext	(	Throwable	$e,
			$catcher = self::CAUGHT_BY_OTHER )

static

Get a PSR-3 log event context from a Throwable.

Creates a structured array containing information about the provided throwable that can be used to augment a log message sent to a PSR-3 logger.

Since: 1.26

Parameters

Throwable	$e
string	$catcher	CAUGHT_BY_* class constant indicating what caught the error

Returns: array

Definition at line 586 of file MWExceptionHandler.php.

◆ getLogMessage()

static MWExceptionHandler::getLogMessage ( Throwable $e )

static

Get a message formatting the throwable message and its origin.

Despite the method name, this is not used for logging. It is only used for HTML or CLI output by MWExceptionRenderer.

Since: 1.22

Parameters

Throwable $e

Returns: string

Definition at line 517 of file MWExceptionHandler.php.

References $url.

◆ getLogNormalMessage()

static MWExceptionHandler::getLogNormalMessage ( Throwable $e )

static

Get a normalised message for formatting with PSR-3 log event context.

Must be used together with getLogContext() to be useful.

Since: 1.30

Parameters

Throwable $e

Returns: string

Definition at line 545 of file MWExceptionHandler.php.

◆ getPublicLogMessage()

static MWExceptionHandler::getPublicLogMessage ( Throwable $e )

static

Parameters

Throwable $e

Returns: string

Definition at line 566 of file MWExceptionHandler.php.

◆ getRedactedTrace()

static MWExceptionHandler::getRedactedTrace ( Throwable $e )

static

Return a copy of a throwable's backtrace as an array.

Like Throwable::getTrace, but replaces each element in each frame's argument array with the name of its class (if the element is an object) or its type (if the element is a PHP primitive).

Since: 1.22

Parameters

Throwable $e

Returns: array

Definition at line 470 of file MWExceptionHandler.php.

◆ getRedactedTraceAsString()

static MWExceptionHandler::getRedactedTraceAsString ( Throwable $e )

static

Generate a string representation of a throwable's stack trace.

Like Throwable::getTraceAsString, but replaces argument values with their type or class name, and prepends the start line of the throwable.

Parameters

Throwable $e

Returns: string

See also: prettyPrintTrace()

Definition at line 412 of file MWExceptionHandler.php.

◆ getStructuredExceptionData()

static MWExceptionHandler::getStructuredExceptionData	(	Throwable	$e,
			$catcher = self::CAUGHT_BY_OTHER )

static

Get a structured representation of a Throwable.

Returns an array of structured data (class, message, code, file, backtrace) derived from the given throwable. The backtrace information will be redacted as per getRedactedTraceAsArray().

Parameters

Throwable	$e
string	$catcher	CAUGHT_BY_* class constant indicating what caught the error

Returns: array

Since: 1.26

Definition at line 617 of file MWExceptionHandler.php.

◆ getURL()

static MWExceptionHandler::getURL ( )

static

If the exception occurred in the course of responding to a request, returns the requested URL.

Otherwise, returns false.

Since: 1.23

Returns: string|false

Definition at line 500 of file MWExceptionHandler.php.

References MW_ENTRY_POINT.

◆ handleError()

static MWExceptionHandler::handleError	(	$level,
		$message,
		$file = null,
		$line = null )

static

Handler for set_error_handler() callback notifications.

Receive a callback from the interpreter for a raised error, create an ErrorException, and log the exception to the 'error' logging channel(s).

Since: 1.25

Parameters

int	$level	Error level raised
string	$message
string \| null	$file
int \| null	$line

Returns: bool

Definition at line 256 of file MWExceptionHandler.php.

◆ handleException()

static MWExceptionHandler::handleException	(	Throwable	$e,
			$catcher = self::CAUGHT_BY_OTHER )

static

Exception handler which simulates the appropriate catch() handling:

try { ... } catch ( Exception $e ) { $e->report(); } catch ( Exception $e ) { echo $e->__toString(); }

Since: 1.25

Parameters

Throwable	$e
string	$catcher	CAUGHT_BY_* class constant indicating what caught the error

Definition at line 237 of file MWExceptionHandler.php.

◆ handleFatalError()

static MWExceptionHandler::handleFatalError ( )

static

Callback used as a registered shutdown function.

This is used as callback from the interpreter at system shutdown. If the last error was not a recoverable error that we already reported, and log as fatal exception.

Special handling is included for missing class errors as they may indicate that the user needs to install 3rd-party libraries via Composer or other means.

Since: 1.25

Returns: bool Always returns false

Definition at line 351 of file MWExceptionHandler.php.

◆ handleUncaughtException()

static MWExceptionHandler::handleUncaughtException ( Throwable $e )

static

Callback to use with PHP's set_exception_handler.

Since: 1.31

Parameters

Throwable $e

Definition at line 206 of file MWExceptionHandler.php.

References wfIsCLI().

◆ installHandler()

static MWExceptionHandler::installHandler	(	bool	$logExceptionBacktrace = true,
		bool	$propagateErrors = true )

static

Install handlers with PHP.

Access: internal

Parameters

bool	$logExceptionBacktrace	Whether error handlers should include a backtrace in the log.
bool	$propagateErrors	Whether errors should be propagated to PHP's built-in handler.

Definition at line 89 of file MWExceptionHandler.php.

◆ jsonSerializeException()

static MWExceptionHandler::jsonSerializeException	(	Throwable	$e,
			$pretty = false,
			$escaping = 0,
			$catcher = self::CAUGHT_BY_OTHER )

static

Serialize a Throwable object to JSON.

The JSON object will have keys 'id', 'file', 'line', 'message', and 'url'. These keys map to string values, with the exception of 'line', which is a number, and 'url', which may be either a string URL or null if the throwable did not occur in the context of serving a web request.

If $wgLogExceptionBacktrace is true, it will also have a 'backtrace' key, mapped to the array return value of Throwable::getTrace, but with each element in each frame's "args" array (if set) replaced with the argument's class name (if the argument is an object) or type name (if the argument is a PHP primitive).

Sample JSON record ($wgLogExceptionBacktrace = false):: {

"id": "c41fb419",

"type": "Exception",

"file": "/var/www/mediawiki/includes/cache/MessageCache.php",

"line": 704,

"message": "Example message",

"url": "/wiki/Main_Page"

}

Sample JSON record ($wgLogExceptionBacktrace = true):: {

"id": "dc457938",

"type": "Exception",

"file": "/var/www/mediawiki/includes/cache/MessageCache.php",

"line": 704,

"message": "Example message",

"url": "/wiki/Main_Page",

"backtrace": [{

"file": "/var/www/mediawiki/includes/OutputPage.php",

"line": 80,

"function": "get",

"class": "MessageCache",

"type": "->",

"args": ["array"]

}]

}

Since: 1.23

Parameters

Throwable	$e
bool	$pretty	Add non-significant whitespace to improve readability (default: false).
int	$escaping	Bitfield consisting of FormatJson::.*_OK class constants.
string	$catcher	CAUGHT_BY_* class constant indicating what caught the error

Returns: string|false JSON string if successful; false upon failure

Definition at line 705 of file MWExceptionHandler.php.

◆ logException()

static MWExceptionHandler::logException	(	Throwable	$e,
			$catcher = self::CAUGHT_BY_OTHER,
			$extraData = [] )

static

Log a throwable to the exception log (if enabled).

This method must not assume the throwable is an MWException, it is also used to handle PHP exceptions or exceptions from other libraries.

Since: 1.22

Parameters

Throwable	$e
string	$catcher	CAUGHT_BY_* class constant indicating what caught the error
array	$extraData	(since 1.34) Additional data to log

Definition at line 729 of file MWExceptionHandler.php.

◆ prettyPrintTrace()

static MWExceptionHandler::prettyPrintTrace	(	array	$trace,
			$pad = '' )

static

Generate a string representation of a stacktrace.

Since: 1.26

Parameters

array	$trace
string	$pad	Constant padding to add to each line of trace

Returns: string

Definition at line 425 of file MWExceptionHandler.php.

◆ redactTrace()

static MWExceptionHandler::redactTrace ( array $trace )

static

Redact a stacktrace generated by Throwable::getTrace(), debug_backtrace() or similar means.

Replaces each element in each frame's argument array with the name of its class (if the element is an object) or its type (if the element is a PHP primitive).

Since: 1.26

Parameters

array $trace Stacktrace

Returns: array Stacktrace with argument values converted to data types

Definition at line 484 of file MWExceptionHandler.php.

◆ report()

static MWExceptionHandler::report ( Throwable $e )

staticprotected

Report a throwable to the user.

Parameters

Throwable $e

Definition at line 126 of file MWExceptionHandler.php.

◆ rollbackPrimaryChangesAndLog()

static MWExceptionHandler::rollbackPrimaryChangesAndLog	(	Throwable	$e,
			$catcher = self::CAUGHT_BY_OTHER )

static

Roll back any open database transactions and log the stack trace of the throwable.

This method is used to attempt to recover from exceptions

Since: 1.37

Parameters

Throwable	$e
string	$catcher	CAUGHT_BY_* class constant indicating what caught the error

Definition at line 191 of file MWExceptionHandler.php.

Member Data Documentation

◆ $reservedMemory

string null MWExceptionHandler::$reservedMemory

staticprotected

Definition at line 47 of file MWExceptionHandler.php.

◆ CAUGHT_BY_ENTRYPOINT

const MWExceptionHandler::CAUGHT_BY_ENTRYPOINT = 'entrypoint'

Error caught and reported by a script entry point.

Definition at line 42 of file MWExceptionHandler.php.

◆ CAUGHT_BY_HANDLER

const MWExceptionHandler::CAUGHT_BY_HANDLER = 'mwe_handler'

Error caught and reported by this exception handler.

Definition at line 40 of file MWExceptionHandler.php.

◆ CAUGHT_BY_OTHER

const MWExceptionHandler::CAUGHT_BY_OTHER = 'other'

Error reported by direct logException() call.

Definition at line 44 of file MWExceptionHandler.php.

The documentation for this class was generated from the following file:

includes/exception/MWExceptionHandler.php

Static Public Member Functions

Public Attributes

Static Protected Member Functions

Static Protected Attributes

Detailed Description

Member Function Documentation

◆ getLogContext()

◆ getLogMessage()

◆ getLogNormalMessage()

◆ getPublicLogMessage()

◆ getRedactedTrace()

◆ getRedactedTraceAsString()

◆ getStructuredExceptionData()

◆ getURL()

◆ handleError()

◆ handleException()

◆ handleFatalError()

◆ handleUncaughtException()

◆ installHandler()

◆ jsonSerializeException()

◆ logException()

◆ prettyPrintTrace()

◆ redactTrace()

◆ report()

◆ rollbackPrimaryChangesAndLog()

Member Data Documentation

◆ $reservedMemory

◆ CAUGHT_BY_ENTRYPOINT

◆ CAUGHT_BY_HANDLER

◆ CAUGHT_BY_OTHER