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ErrorHandler.php
001 <?php
002
003 /*
004 * This file is part of the Symfony package.
005 *
006 * (c) Fabien Potencier <fabien@symfony.com>
007 *
008 * For the full copyright and license information, please view the LICENSE
009 * file that was distributed with this source code.
010 */
011
012 namespace Symfony\Component\Debug;
013
014 use Psr\Log\LoggerInterface;
015 use Psr\Log\LogLevel;
016 use Symfony\Component\Debug\Exception\ContextErrorException;
017 use Symfony\Component\Debug\Exception\FatalErrorException;
018 use Symfony\Component\Debug\Exception\FatalThrowableError;
019 use Symfony\Component\Debug\Exception\OutOfMemoryException;
020 use Symfony\Component\Debug\Exception\SilencedErrorContext;
021 use Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandler;
022 use Symfony\Component\Debug\FatalErrorHandler\FatalErrorHandlerInterface;
023 use Symfony\Component\Debug\FatalErrorHandler\UndefinedFunctionFatalErrorHandler;
024 use Symfony\Component\Debug\FatalErrorHandler\UndefinedMethodFatalErrorHandler;
025
026 /**
027 * A generic ErrorHandler for the PHP engine.
028 *
029 * Provides five bit fields that control how errors are handled:
030 * - thrownErrors: errors thrown as \ErrorException
031 * - loggedErrors: logged errors, when not @-silenced
032 * - scopedErrors: errors thrown or logged with their local context
033 * - tracedErrors: errors logged with their stack trace
034 * - screamedErrors: never @-silenced errors
035 *
036 * Each error level can be logged by a dedicated PSR-3 logger object.
037 * Screaming only applies to logging.
038 * Throwing takes precedence over logging.
039 * Uncaught exceptions are logged as E_ERROR.
040 * E_DEPRECATED and E_USER_DEPRECATED levels never throw.
041 * E_RECOVERABLE_ERROR and E_USER_ERROR levels always throw.
042 * Non catchable errors that can be detected at shutdown time are logged when the scream bit field allows so.
043 * As errors have a performance cost, repeated errors are all logged, so that the developer
044 * can see them and weight them as more important to fix than others of the same level.
045 *
046 * @author Nicolas Grekas <p@tchwork.com>
047 * @author Grégoire Pineau <lyrixx@lyrixx.info>
048 */
049 class ErrorHandler
050 {
051 private $levels = [
052 \E_DEPRECATED => 'Deprecated',
053 \E_USER_DEPRECATED => 'User Deprecated',
054 \E_NOTICE => 'Notice',
055 \E_USER_NOTICE => 'User Notice',
056 \E_STRICT => 'Runtime Notice',
057 \E_WARNING => 'Warning',
058 \E_USER_WARNING => 'User Warning',
059 \E_COMPILE_WARNING => 'Compile Warning',
060 \E_CORE_WARNING => 'Core Warning',
061 \E_USER_ERROR => 'User Error',
062 \E_RECOVERABLE_ERROR => 'Catchable Fatal Error',
063 \E_COMPILE_ERROR => 'Compile Error',
064 \E_PARSE => 'Parse Error',
065 \E_ERROR => 'Error',
066 \E_CORE_ERROR => 'Core Error',
067 ];
068
069 private $loggers = [
070 \E_DEPRECATED => [null, LogLevel::INFO],
071 \E_USER_DEPRECATED => [null, LogLevel::INFO],
072 \E_NOTICE => [null, LogLevel::WARNING],
073 \E_USER_NOTICE => [null, LogLevel::WARNING],
074 \E_STRICT => [null, LogLevel::WARNING],
075 \E_WARNING => [null, LogLevel::WARNING],
076 \E_USER_WARNING => [null, LogLevel::WARNING],
077 \E_COMPILE_WARNING => [null, LogLevel::WARNING],
078 \E_CORE_WARNING => [null, LogLevel::WARNING],
079 \E_USER_ERROR => [null, LogLevel::CRITICAL],
080 \E_RECOVERABLE_ERROR => [null, LogLevel::CRITICAL],
081 \E_COMPILE_ERROR => [null, LogLevel::CRITICAL],
082 \E_PARSE => [null, LogLevel::CRITICAL],
083 \E_ERROR => [null, LogLevel::CRITICAL],
084 \E_CORE_ERROR => [null, LogLevel::CRITICAL],
085 ];
086
087 private $thrownErrors = 0x1FFF; // E_ALL - E_DEPRECATED - E_USER_DEPRECATED
088 private $scopedErrors = 0x1FFF; // E_ALL - E_DEPRECATED - E_USER_DEPRECATED
089 private $tracedErrors = 0x77FB; // E_ALL - E_STRICT - E_PARSE
090 private $screamedErrors = 0x55; // E_ERROR + E_CORE_ERROR + E_COMPILE_ERROR + E_PARSE
091 private $loggedErrors = 0;
092 private $traceReflector;
093
094 private $isRecursive = 0;
095 private $isRoot = false;
096 private $exceptionHandler;
097 private $bootstrappingLogger;
098
099 private static $reservedMemory;
100 private static $stackedErrors = [];
101 private static $stackedErrorLevels = [];
102 private static $toStringException = null;
103 private static $silencedErrorCache = [];
104 private static $silencedErrorCount = 0;
105 private static $exitCode = 0;
106
107 /**
108 * Registers the error handler.
109 *
110 * @param self|null $handler The handler to register
111 * @param bool $replace Whether to replace or not any existing handler
112 *
113 * @return self The registered error handler
114 */
115 public static function register(self $handler = null, $replace = true)
116 {
117 if (null === self::$reservedMemory) {
118 self::$reservedMemory = str_repeat('x', 10240);
119 register_shutdown_function(__CLASS__.'::handleFatalError');
120 }
121
122 if ($handlerIsNew = null === $handler) {
123 $handler = new static();
124 }
125
126 if (null === $prev = set_error_handler([$handler, 'handleError'])) {
127 restore_error_handler();
128 // Specifying the error types earlier would expose us to https://bugs.php.net/63206
129 set_error_handler([$handler, 'handleError'], $handler->thrownErrors | $handler->loggedErrors);
130 $handler->isRoot = true;
131 }
132
133 if ($handlerIsNew && \is_array($prev) && $prev[0] instanceof self) {
134 $handler = $prev[0];
135 $replace = false;
136 }
137 if (!$replace && $prev) {
138 restore_error_handler();
139 $handlerIsRegistered = \is_array($prev) && $handler === $prev[0];
140 } else {
141 $handlerIsRegistered = true;
142 }
143 if (\is_array($prev = set_exception_handler([$handler, 'handleException'])) && $prev[0] instanceof self) {
144 restore_exception_handler();
145 if (!$handlerIsRegistered) {
146 $handler = $prev[0];
147 } elseif ($handler !== $prev[0] && $replace) {
148 set_exception_handler([$handler, 'handleException']);
149 $p = $prev[0]->setExceptionHandler(null);
150 $handler->setExceptionHandler($p);
151 $prev[0]->setExceptionHandler($p);
152 }
153 } else {
154 $handler->setExceptionHandler($prev);
155 }
156
157 $handler->throwAt(\E_ALL & $handler->thrownErrors, true);
158
159 return $handler;
160 }
161
162 public function __construct(BufferingLogger $bootstrappingLogger = null)
163 {
164 if ($bootstrappingLogger) {
165 $this->bootstrappingLogger = $bootstrappingLogger;
166 $this->setDefaultLogger($bootstrappingLogger);
167 }
168 $this->traceReflector = new \ReflectionProperty('Exception', 'trace');
169 $this->traceReflector->setAccessible(true);
170 }
171
172 /**
173 * Sets a logger to non assigned errors levels.
174 *
175 * @param LoggerInterface $logger A PSR-3 logger to put as default for the given levels
176 * @param array|int $levels An array map of E_* to LogLevel::* or an integer bit field of E_* constants
177 * @param bool $replace Whether to replace or not any existing logger
178 */
179 public function setDefaultLogger(LoggerInterface $logger, $levels = \E_ALL, $replace = false)
180 {
181 $loggers = [];
182
183 if (\is_array($levels)) {
184 foreach ($levels as $type => $logLevel) {
185 if (empty($this->loggers[$type][0]) || $replace || $this->loggers[$type][0] === $this->bootstrappingLogger) {
186 $loggers[$type] = [$logger, $logLevel];
187 }
188 }
189 } else {
190 if (null === $levels) {
191 $levels = \E_ALL;
192 }
193 foreach ($this->loggers as $type => $log) {
194 if (($type & $levels) && (empty($log[0]) || $replace || $log[0] === $this->bootstrappingLogger)) {
195 $log[0] = $logger;
196 $loggers[$type] = $log;
197 }
198 }
199 }
200
201 $this->setLoggers($loggers);
202 }
203
204 /**
205 * Sets a logger for each error level.
206 *
207 * @param array $loggers Error levels to [LoggerInterface|null, LogLevel::*] map
208 *
209 * @return array The previous map
210 *
211 * @throws \InvalidArgumentException
212 */
213 public function setLoggers(array $loggers)
214 {
215 $prevLogged = $this->loggedErrors;
216 $prev = $this->loggers;
217 $flush = [];
218
219 foreach ($loggers as $type => $log) {
220 if (!isset($prev[$type])) {
221 throw new \InvalidArgumentException('Unknown error type: '.$type);
222 }
223 if (!\is_array($log)) {
224 $log = [$log];
225 } elseif (!\array_key_exists(0, $log)) {
226 throw new \InvalidArgumentException('No logger provided.');
227 }
228 if (null === $log[0]) {
229 $this->loggedErrors &= ~$type;
230 } elseif ($log[0] instanceof LoggerInterface) {
231 $this->loggedErrors |= $type;
232 } else {
233 throw new \InvalidArgumentException('Invalid logger provided.');
234 }
235 $this->loggers[$type] = $log + $prev[$type];
236
237 if ($this->bootstrappingLogger && $prev[$type][0] === $this->bootstrappingLogger) {
238 $flush[$type] = $type;
239 }
240 }
241 $this->reRegister($prevLogged | $this->thrownErrors);
242
243 if ($flush) {
244 foreach ($this->bootstrappingLogger->cleanLogs() as $log) {
245 $type = $log[2]['exception'] instanceof \ErrorException ? $log[2]['exception']->getSeverity() : \E_ERROR;
246 if (!isset($flush[$type])) {
247 $this->bootstrappingLogger->log($log[0], $log[1], $log[2]);
248 } elseif ($this->loggers[$type][0]) {
249 $this->loggers[$type][0]->log($this->loggers[$type][1], $log[1], $log[2]);
250 }
251 }
252 }
253
254 return $prev;
255 }
256
257 /**
258 * Sets a user exception handler.
259 *
260 * @param callable $handler A handler that will be called on Exception
261 *
262 * @return callable|null The previous exception handler
263 */
264 public function setExceptionHandler(callable $handler = null)
265 {
266 $prev = $this->exceptionHandler;
267 $this->exceptionHandler = $handler;
268
269 return $prev;
270 }
271
272 /**
273 * Sets the PHP error levels that throw an exception when a PHP error occurs.
274 *
275 * @param int $levels A bit field of E_* constants for thrown errors
276 * @param bool $replace Replace or amend the previous value
277 *
278 * @return int The previous value
279 */
280 public function throwAt($levels, $replace = false)
281 {
282 $prev = $this->thrownErrors;
283 $this->thrownErrors = ($levels | \E_RECOVERABLE_ERROR | \E_USER_ERROR) & ~\E_USER_DEPRECATED & ~\E_DEPRECATED;
284 if (!$replace) {
285 $this->thrownErrors |= $prev;
286 }
287 $this->reRegister($prev | $this->loggedErrors);
288
289 return $prev;
290 }
291
292 /**
293 * Sets the PHP error levels for which local variables are preserved.
294 *
295 * @param int $levels A bit field of E_* constants for scoped errors
296 * @param bool $replace Replace or amend the previous value
297 *
298 * @return int The previous value
299 */
300 public function scopeAt($levels, $replace = false)
301 {
302 $prev = $this->scopedErrors;
303 $this->scopedErrors = (int) $levels;
304 if (!$replace) {
305 $this->scopedErrors |= $prev;
306 }
307
308 return $prev;
309 }
310
311 /**
312 * Sets the PHP error levels for which the stack trace is preserved.
313 *
314 * @param int $levels A bit field of E_* constants for traced errors
315 * @param bool $replace Replace or amend the previous value
316 *
317 * @return int The previous value
318 */
319 public function traceAt($levels, $replace = false)
320 {
321 $prev = $this->tracedErrors;
322 $this->tracedErrors = (int) $levels;
323 if (!$replace) {
324 $this->tracedErrors |= $prev;
325 }
326
327 return $prev;
328 }
329
330 /**
331 * Sets the error levels where the @-operator is ignored.
332 *
333 * @param int $levels A bit field of E_* constants for screamed errors
334 * @param bool $replace Replace or amend the previous value
335 *
336 * @return int The previous value
337 */
338 public function screamAt($levels, $replace = false)
339 {
340 $prev = $this->screamedErrors;
341 $this->screamedErrors = (int) $levels;
342 if (!$replace) {
343 $this->screamedErrors |= $prev;
344 }
345
346 return $prev;
347 }
348
349 /**
350 * Re-registers as a PHP error handler if levels changed.
351 */
352 private function reRegister($prev)
353 {
354 if ($prev !== $this->thrownErrors | $this->loggedErrors) {
355 $handler = set_error_handler('var_dump');
356 $handler = \is_array($handler) ? $handler[0] : null;
357 restore_error_handler();
358 if ($handler === $this) {
359 restore_error_handler();
360 if ($this->isRoot) {
361 set_error_handler([$this, 'handleError'], $this->thrownErrors | $this->loggedErrors);
362 } else {
363 set_error_handler([$this, 'handleError']);
364 }
365 }
366 }
367 }
368
369 /**
370 * Handles errors by filtering then logging them according to the configured bit fields.
371 *
372 * @param int $type One of the E_* constants
373 * @param string $message
374 * @param string $file
375 * @param int $line
376 *
377 * @return bool Returns false when no handling happens so that the PHP engine can handle the error itself
378 *
379 * @throws \ErrorException When $this->thrownErrors requests so
380 *
381 * @internal
382 */
383 public function handleError($type, $message, $file, $line)
384 {
385 if (\PHP_VERSION_ID >= 70300 && \E_WARNING === $type && '"' === $message[0] && false !== strpos($message, '" targeting switch is equivalent to "break')) {
386 $type = \E_DEPRECATED;
387 }
388
389 // Level is the current error reporting level to manage silent error.
390 $level = error_reporting();
391 $silenced = 0 === ($level & $type);
392 // Strong errors are not authorized to be silenced.
393 $level |= \E_RECOVERABLE_ERROR | \E_USER_ERROR | \E_DEPRECATED | \E_USER_DEPRECATED;
394 $log = $this->loggedErrors & $type;
395 $throw = $this->thrownErrors & $type & $level;
396 $type &= $level | $this->screamedErrors;
397
398 if (!$type || (!$log && !$throw)) {
399 return !$silenced && $type && $log;
400 }
401 $scope = $this->scopedErrors & $type;
402
403 if (4 < $numArgs = \func_num_args()) {
404 $context = func_get_arg(4) ?: [];
405 $backtrace = 5 < $numArgs ? func_get_arg(5) : null; // defined on HHVM
406 } else {
407 $context = [];
408 $backtrace = null;
409 }
410
411 if (isset($context['GLOBALS']) && $scope) {
412 $e = $context; // Whatever the signature of the method,
413 unset($e['GLOBALS'], $context); // $context is always a reference in 5.3
414 $context = $e;
415 }
416
417 if (null !== $backtrace && $type & \E_ERROR) {
418 // E_ERROR fatal errors are triggered on HHVM when
419 // hhvm.error_handling.call_user_handler_on_fatals=1
420 // which is the way to get their backtrace.
421 $this->handleFatalError(compact('type', 'message', 'file', 'line', 'backtrace'));
422
423 return true;
424 }
425
426 $logMessage = $this->levels[$type].': '.$message;
427
428 if (null !== self::$toStringException) {
429 $errorAsException = self::$toStringException;
430 self::$toStringException = null;
431 } elseif (!$throw && !($type & $level)) {
432 if (!isset(self::$silencedErrorCache[$id = $file.':'.$line])) {
433 $lightTrace = $this->tracedErrors & $type ? $this->cleanTrace(debug_backtrace(\DEBUG_BACKTRACE_IGNORE_ARGS, 3), $type, $file, $line, false) : [];
434 $errorAsException = new SilencedErrorContext($type, $file, $line, $lightTrace);
435 } elseif (isset(self::$silencedErrorCache[$id][$message])) {
436 $lightTrace = null;
437 $errorAsException = self::$silencedErrorCache[$id][$message];
438 ++$errorAsException->count;
439 } else {
440 $lightTrace = [];
441 $errorAsException = null;
442 }
443
444 if (100 < ++self::$silencedErrorCount) {
445 self::$silencedErrorCache = $lightTrace = [];
446 self::$silencedErrorCount = 1;
447 }
448 if ($errorAsException) {
449 self::$silencedErrorCache[$id][$message] = $errorAsException;
450 }
451 if (null === $lightTrace) {
452 return true;
453 }
454 } else {
455 if ($scope) {
456 $errorAsException = new ContextErrorException($logMessage, 0, $type, $file, $line, $context);
457 } else {
458 $errorAsException = new \ErrorException($logMessage, 0, $type, $file, $line);
459 }
460
461 // Clean the trace by removing function arguments and the first frames added by the error handler itself.
462 if ($throw || $this->tracedErrors & $type) {
463 $backtrace = $backtrace ?: $errorAsException->getTrace();
464 $lightTrace = $this->cleanTrace($backtrace, $type, $file, $line, $throw);
465 $this->traceReflector->setValue($errorAsException, $lightTrace);
466 } else {
467 $this->traceReflector->setValue($errorAsException, []);
468 }
469 }
470
471 if ($throw) {
472 if (\PHP_VERSION_ID < 70400 && \E_USER_ERROR & $type) {
473 for ($i = 1; isset($backtrace[$i]); ++$i) {
474 if (isset($backtrace[$i]['function'], $backtrace[$i]['type'], $backtrace[$i - 1]['function'])
475 && '__toString' === $backtrace[$i]['function']
476 && '->' === $backtrace[$i]['type']
477 && !isset($backtrace[$i - 1]['class'])
478 && ('trigger_error' === $backtrace[$i - 1]['function'] || 'user_error' === $backtrace[$i - 1]['function'])
479 ) {
480 // Here, we know trigger_error() has been called from __toString().
481 // HHVM is fine with throwing from __toString() but PHP triggers a fatal error instead.
482 // A small convention allows working around the limitation:
483 // given a caught $e exception in __toString(), quitting the method with
484 // `return trigger_error($e, E_USER_ERROR);` allows this error handler
485 // to make $e get through the __toString() barrier.
486
487 foreach ($context as $e) {
488 if (($e instanceof \Exception || $e instanceof \Throwable) && $e->__toString() === $message) {
489 if (1 === $i) {
490 // On HHVM
491 $errorAsException = $e;
492 break;
493 }
494 self::$toStringException = $e;
495
496 return true;
497 }
498 }
499
500 if (1 < $i) {
501 // On PHP (not on HHVM), display the original error message instead of the default one.
502 $this->handleException($errorAsException);
503
504 // Stop the process by giving back the error to the native handler.
505 return false;
506 }
507 }
508 }
509 }
510
511 throw $errorAsException;
512 }
513
514 if ($this->isRecursive) {
515 $log = 0;
516 } elseif (self::$stackedErrorLevels) {
517 self::$stackedErrors[] = [
518 $this->loggers[$type][0],
519 ($type & $level) ? $this->loggers[$type][1] : LogLevel::DEBUG,
520 $logMessage,
521 $errorAsException ? ['exception' => $errorAsException] : [],
522 ];
523 } else {
524 if (\PHP_VERSION_ID < (\PHP_VERSION_ID < 70400 ? 70316 : 70404) && !\defined('HHVM_VERSION')) {
525 $currentErrorHandler = set_error_handler('var_dump');
526 restore_error_handler();
527 }
528
529 try {
530 $this->isRecursive = true;
531 $level = ($type & $level) ? $this->loggers[$type][1] : LogLevel::DEBUG;
532 $this->loggers[$type][0]->log($level, $logMessage, $errorAsException ? ['exception' => $errorAsException] : []);
533 } finally {
534 $this->isRecursive = false;
535
536 if (\PHP_VERSION_ID < (\PHP_VERSION_ID < 70400 ? 70316 : 70404) && !\defined('HHVM_VERSION')) {
537 set_error_handler($currentErrorHandler);
538 }
539 }
540 }
541
542 return !$silenced && $type && $log;
543 }
544
545 /**
546 * Handles an exception by logging then forwarding it to another handler.
547 *
548 * @param \Exception|\Throwable $exception An exception to handle
549 * @param array $error An array as returned by error_get_last()
550 *
551 * @internal
552 */
553 public function handleException($exception, array $error = null)
554 {
555 if (null === $error) {
556 self::$exitCode = 255;
557 }
558 if (!$exception instanceof \Exception) {
559 $exception = new FatalThrowableError($exception);
560 }
561 $type = $exception instanceof FatalErrorException ? $exception->getSeverity() : \E_ERROR;
562 $handlerException = null;
563
564 if (($this->loggedErrors & $type) || $exception instanceof FatalThrowableError) {
565 if ($exception instanceof FatalErrorException) {
566 if ($exception instanceof FatalThrowableError) {
567 $error = [
568 'type' => $type,
569 'message' => $message = $exception->getMessage(),
570 'file' => $exception->getFile(),
571 'line' => $exception->getLine(),
572 ];
573 } else {
574 $message = 'Fatal '.$exception->getMessage();
575 }
576 } elseif ($exception instanceof \ErrorException) {
577 $message = 'Uncaught '.$exception->getMessage();
578 } else {
579 $message = 'Uncaught Exception: '.$exception->getMessage();
580 }
581 }
582 if ($this->loggedErrors & $type) {
583 try {
584 $this->loggers[$type][0]->log($this->loggers[$type][1], $message, ['exception' => $exception]);
585 } catch (\Exception $handlerException) {
586 } catch (\Throwable $handlerException) {
587 }
588 }
589 if ($exception instanceof FatalErrorException && !$exception instanceof OutOfMemoryException && $error) {
590 foreach ($this->getFatalErrorHandlers() as $handler) {
591 if ($e = $handler->handleError($error, $exception)) {
592 $exception = $e;
593 break;
594 }
595 }
596 }
597 $exceptionHandler = $this->exceptionHandler;
598 $this->exceptionHandler = null;
599 try {
600 if (null !== $exceptionHandler) {
601 $exceptionHandler($exception);
602
603 return;
604 }
605 $handlerException = $handlerException ?: $exception;
606 } catch (\Exception $handlerException) {
607 } catch (\Throwable $handlerException) {
608 }
609 if ($exception === $handlerException) {
610 self::$reservedMemory = null; // Disable the fatal error handler
611 throw $exception; // Give back $exception to the native handler
612 }
613 $this->handleException($handlerException);
614 }
615
616 /**
617 * Shutdown registered function for handling PHP fatal errors.
618 *
619 * @param array $error An array as returned by error_get_last()
620 *
621 * @internal
622 */
623 public static function handleFatalError(array $error = null)
624 {
625 if (null === self::$reservedMemory) {
626 return;
627 }
628
629 $handler = self::$reservedMemory = null;
630 $handlers = [];
631 $previousHandler = null;
632 $sameHandlerLimit = 10;
633
634 while (!\is_array($handler) || !$handler[0] instanceof self) {
635 $handler = set_exception_handler('var_dump');
636 restore_exception_handler();
637
638 if (!$handler) {
639 break;
640 }
641 restore_exception_handler();
642
643 if ($handler !== $previousHandler) {
644 array_unshift($handlers, $handler);
645 $previousHandler = $handler;
646 } elseif (0 === --$sameHandlerLimit) {
647 $handler = null;
648 break;
649 }
650 }
651 foreach ($handlers as $h) {
652 set_exception_handler($h);
653 }
654 if (!$handler) {
655 return;
656 }
657 if ($handler !== $h) {
658 $handler[0]->setExceptionHandler($h);
659 }
660 $handler = $handler[0];
661 $handlers = [];
662
663 if ($exit = null === $error) {
664 $error = error_get_last();
665 }
666
667 try {
668 while (self::$stackedErrorLevels) {
669 static::unstackErrors();
670 }
671 } catch (\Exception $exception) {
672 // Handled below
673 } catch (\Throwable $exception) {
674 // Handled below
675 }
676
677 if ($error && $error['type'] &= \E_PARSE | \E_ERROR | \E_CORE_ERROR | \E_COMPILE_ERROR) {
678 // Let's not throw anymore but keep logging
679 $handler->throwAt(0, true);
680 $trace = isset($error['backtrace']) ? $error['backtrace'] : null;
681
682 if (0 === strpos($error['message'], 'Allowed memory') || 0 === strpos($error['message'], 'Out of memory')) {
683 $exception = new OutOfMemoryException($handler->levels[$error['type']].': '.$error['message'], 0, $error['type'], $error['file'], $error['line'], 2, false, $trace);
684 } else {
685 $exception = new FatalErrorException($handler->levels[$error['type']].': '.$error['message'], 0, $error['type'], $error['file'], $error['line'], 2, true, $trace);
686 }
687 }
688
689 try {
690 if (isset($exception)) {
691 self::$exitCode = 255;
692 $handler->handleException($exception, $error);
693 }
694 } catch (FatalErrorException $e) {
695 // Ignore this re-throw
696 }
697
698 if ($exit && self::$exitCode) {
699 $exitCode = self::$exitCode;
700 register_shutdown_function('register_shutdown_function', function () use ($exitCode) { exit($exitCode); });
701 }
702 }
703
704 /**
705 * Configures the error handler for delayed handling.
706 * Ensures also that non-catchable fatal errors are never silenced.
707 *
708 * As shown by http://bugs.php.net/42098 and http://bugs.php.net/60724
709 * PHP has a compile stage where it behaves unusually. To workaround it,
710 * we plug an error handler that only stacks errors for later.
711 *
712 * The most important feature of this is to prevent
713 * autoloading until unstackErrors() is called.
714 *
715 * @deprecated since version 3.4, to be removed in 4.0.
716 */
717 public static function stackErrors()
718 {
719 @trigger_error('Support for stacking errors is deprecated since Symfony 3.4 and will be removed in 4.0.', \E_USER_DEPRECATED);
720
721 self::$stackedErrorLevels[] = error_reporting(error_reporting() | \E_PARSE | \E_ERROR | \E_CORE_ERROR | \E_COMPILE_ERROR);
722 }
723
724 /**
725 * Unstacks stacked errors and forwards to the logger.
726 *
727 * @deprecated since version 3.4, to be removed in 4.0.
728 */
729 public static function unstackErrors()
730 {
731 @trigger_error('Support for unstacking errors is deprecated since Symfony 3.4 and will be removed in 4.0.', \E_USER_DEPRECATED);
732
733 $level = array_pop(self::$stackedErrorLevels);
734
735 if (null !== $level) {
736 $errorReportingLevel = error_reporting($level);
737 if ($errorReportingLevel !== ($level | \E_PARSE | \E_ERROR | \E_CORE_ERROR | \E_COMPILE_ERROR)) {
738 // If the user changed the error level, do not overwrite it
739 error_reporting($errorReportingLevel);
740 }
741 }
742
743 if (empty(self::$stackedErrorLevels)) {
744 $errors = self::$stackedErrors;
745 self::$stackedErrors = [];
746
747 foreach ($errors as $error) {
748 $error[0]->log($error[1], $error[2], $error[3]);
749 }
750 }
751 }
752
753 /**
754 * Gets the fatal error handlers.
755 *
756 * Override this method if you want to define more fatal error handlers.
757 *
758 * @return FatalErrorHandlerInterface[] An array of FatalErrorHandlerInterface
759 */
760 protected function getFatalErrorHandlers()
761 {
762 return [
763 new UndefinedFunctionFatalErrorHandler(),
764 new UndefinedMethodFatalErrorHandler(),
765 new ClassNotFoundFatalErrorHandler(),
766 ];
767 }
768
769 private function cleanTrace($backtrace, $type, $file, $line, $throw)
770 {
771 $lightTrace = $backtrace;
772
773 for ($i = 0; isset($backtrace[$i]); ++$i) {
774 if (isset($backtrace[$i]['file'], $backtrace[$i]['line']) && $backtrace[$i]['line'] === $line && $backtrace[$i]['file'] === $file) {
775 $lightTrace = \array_slice($lightTrace, 1 + $i);
776 break;
777 }
778 }
779 if (!($throw || $this->scopedErrors & $type)) {
780 for ($i = 0; isset($lightTrace[$i]); ++$i) {
781 unset($lightTrace[$i]['args'], $lightTrace[$i]['object']);
782 }
783 }
784
785 return $lightTrace;
786 }
787 }
788