1. class
  2. Symfony
  3. Component
  4. Debug
  5. ErrorHandler

ErrorHandler

class ErrorHandler

A generic ErrorHandler for the PHP engine.

Provides five bit fields that control how errors are handled: - thrownErrors: errors thrown as \ErrorException - loggedErrors: logged errors, when not @-silenced - scopedErrors: errors thrown or logged with their local context - tracedErrors: errors logged with their stack trace, only once for repeated errors - screamedErrors: never @-silenced errors

Each error level can be logged by a dedicated PSR-3 logger object. Screaming only applies to logging. Throwing takes precedence over logging. Uncaught exceptions are logged as EERROR. EDEPRECATED and EUSERDEPRECATED levels never throw. ERECOVERABLEERROR and EUSERERROR levels always throw. Non catchable errors that can be detected at shutdown time are logged when the scream bit field allows so. As errors have a performance cost, repeated errors are all logged, so that the developer can see them and weight them as more important to fix than others of the same level.

Methods

static ErrorHandler
register(ErrorHandler $handler = null, bool $replace = true)

Registers the error handler.

__construct(BufferingLogger $bootstrappingLogger = null)

No description

setDefaultLogger(LoggerInterface $logger, array|int $levels = null, bool $replace = false)

Sets a logger to non assigned errors levels.

array
setLoggers(array $loggers)

Sets a logger for each error level.

callable|null
setExceptionHandler(callable $handler = null)

Sets a user exception handler.

int
throwAt(int $levels, bool $replace = false)

Sets the PHP error levels that throw an exception when a PHP error occurs.

int
scopeAt(int $levels, bool $replace = false)

Sets the PHP error levels for which local variables are preserved.

int
traceAt(int $levels, bool $replace = false)

Sets the PHP error levels for which the stack trace is preserved.

int
screamAt(int $levels, bool $replace = false)

Sets the error levels where the @-operator is ignored.

bool
handleError($type, $message, $file, $line, array $context, array $backtrace = null)

Handles errors by filtering then logging them according to the configured bit fields.

handleException(Exception|Throwable $exception, array $error = null)

Handles an exception by logging then forwarding it to another handler.

static 
handleFatalError(array $error = null)

Shutdown registered function for handling PHP fatal errors.

static 
stackErrors()

Configures the error handler for delayed handling.

static 
unstackErrors()

Unstacks stacked errors and forwards to the logger.

Details

at line line 109
static ErrorHandler register(ErrorHandler $handler = null, bool $replace = true)

Registers the error handler.

Parameters

ErrorHandler $handler The handler to register
bool $replace Whether to replace or not any existing handler

Return Value

ErrorHandler The registered error handler

at line line 139
__construct(BufferingLogger $bootstrappingLogger = null)

Parameters

BufferingLogger $bootstrappingLogger

at line line 154
setDefaultLogger(LoggerInterface $logger, array|int $levels = null, bool $replace = false)

Sets a logger to non assigned errors levels.

Parameters

LoggerInterface $logger A PSR-3 logger to put as default for the given levels
array|int $levels An array map of E* to LogLevel::* or an integer bit field of E* constants
bool $replace Whether to replace or not any existing logger

at line line 188
array setLoggers(array $loggers)

Sets a logger for each error level.

Parameters

array $loggers Error levels to [LoggerInterface|null, LogLevel::*] map

Return Value

array The previous map

Exceptions

InvalidArgumentException

at line line 239
callable|null setExceptionHandler(callable $handler = null)

Sets a user exception handler.

Parameters

callable $handler A handler that will be called on Exception

Return Value

callable|null The previous exception handler

at line line 255
int throwAt(int $levels, bool $replace = false)

Sets the PHP error levels that throw an exception when a PHP error occurs.

Parameters

int $levels A bit field of E_* constants for thrown errors
bool $replace Replace or amend the previous value

Return Value

int The previous value

at line line 275
int scopeAt(int $levels, bool $replace = false)

Sets the PHP error levels for which local variables are preserved.

Parameters

int $levels A bit field of E_* constants for scoped errors
bool $replace Replace or amend the previous value

Return Value

int The previous value

at line line 294
int traceAt(int $levels, bool $replace = false)

Sets the PHP error levels for which the stack trace is preserved.

Parameters

int $levels A bit field of E_* constants for traced errors
bool $replace Replace or amend the previous value

Return Value

int The previous value

at line line 313
int screamAt(int $levels, bool $replace = false)

Sets the error levels where the @-operator is ignored.

Parameters

int $levels A bit field of E_* constants for screamed errors
bool $replace Replace or amend the previous value

Return Value

int The previous value

at line line 354
bool handleError($type, $message, $file, $line, array $context, array $backtrace = null)

Handles errors by filtering then logging them according to the configured bit fields.

Parameters

$type
$message
$file
$line
array $context
array $backtrace

Return Value

bool Returns false when no handling happens so that the PHP engine can handle the error itself.

Exceptions

ErrorException When $this->thrownErrors requests so

at line line 482
handleException(Exception|Throwable $exception, array $error = null)

Handles an exception by logging then forwarding it to another handler.

Parameters

Exception|Throwable $exception An exception to handle
array $error An array as returned by errorgetlast()

at line line 549
static handleFatalError(array $error = null)

Shutdown registered function for handling PHP fatal errors.

Parameters

array $error An array as returned by errorgetlast()

at line line 609
static stackErrors()

Configures the error handler for delayed handling.

Ensures also that non-catchable fatal errors are never silenced.

As shown by http://bugs.php.net/42098 and http://bugs.php.net/60724 PHP has a compile stage where it behaves unusually. To workaround it, we plug an error handler that only stacks errors for later.

The most important feature of this is to prevent autoloading until unstackErrors() is called.

at line line 617
static unstackErrors()

Unstacks stacked errors and forwards to the logger.