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File / Folder	Size	Action
.	-
Attribute	--	ren
Formatter	--	ren
Handler	--	ren
Processor	--	ren
Test	--	ren
DateTimeImmutable.php	1.032KB	edt ren
ErrorHandler.php	10KB	edt ren
Level.php	5.352KB	edt ren
LogRecord.php	3.283KB	edt ren
Logger.php	22.435KB	edt ren
Registry.php	3.928KB	edt ren
ResettableInterface.php	0.951KB	edt ren
SignalHandler.php	3.803KB	edt ren
Utils.php	9.17KB	edt ren

<?php declare(strict_types=1);

/*
 * This file is part of the Monolog package.
 *
 * (c) Jordi Boggiano <j.boggiano@seld.be>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Monolog;

use Closure;
use Psr\Log\LoggerInterface;
use Psr\Log\LogLevel;

/**
 * Monolog error handler
 *
 * A facility to enable logging of runtime errors, exceptions and fatal errors.
 *
 * Quick setup: <code>ErrorHandler::register($logger);</code>
 *
 * @author Jordi Boggiano <j.boggiano@seld.be>
 */
class ErrorHandler
{
    private Closure|null $previousExceptionHandler = null;

/** @var array<class-string, LogLevel::*> an array of class name to LogLevel::* constant mapping */
    private array $uncaughtExceptionLevelMap = [];

/** @var Closure|true|null */
    private Closure|bool|null $previousErrorHandler = null;

/** @var array<int, LogLevel::*> an array of E_* constant to LogLevel::* constant mapping */
    private array $errorLevelMap = [];

private bool $handleOnlyReportedErrors = true;

private bool $hasFatalErrorHandler = false;

private string $fatalLevel = LogLevel::ALERT;

private string|null $reservedMemory = null;

/** @var ?array{type: int, message: string, file: string, line: int, trace: mixed} */
    private array|null $lastFatalData = null;

private const FATAL_ERRORS = [E_ERROR, E_PARSE, E_CORE_ERROR, E_COMPILE_ERROR, E_USER_ERROR];

public function __construct(
        private LoggerInterface $logger
    ) {
    }

/**
     * Registers a new ErrorHandler for a given Logger
     *
     * By default it will handle errors, exceptions and fatal errors
     *
     * @param  array<int, LogLevel::*>|false          $errorLevelMap     an array of E_* constant to LogLevel::* constant mapping, or false to disable error handling
     * @param  array<class-string, LogLevel::*>|false $exceptionLevelMap an array of class name to LogLevel::* constant mapping, or false to disable exception handling
     * @param  LogLevel::*|null|false                 $fatalLevel        a LogLevel::* constant, null to use the default LogLevel::ALERT or false to disable fatal error handling
     * @return static
     */
    public static function register(LoggerInterface $logger, $errorLevelMap = [], $exceptionLevelMap = [], $fatalLevel = null): self
    {
        /** @phpstan-ignore-next-line */
        $handler = new static($logger);
        if ($errorLevelMap !== false) {
            $handler->registerErrorHandler($errorLevelMap);
        }
        if ($exceptionLevelMap !== false) {
            $handler->registerExceptionHandler($exceptionLevelMap);
        }
        if ($fatalLevel !== false) {
            $handler->registerFatalHandler($fatalLevel);
        }

return $handler;
    }

/**
     * @param  array<class-string, LogLevel::*> $levelMap an array of class name to LogLevel::* constant mapping
     * @return $this
     */
    public function registerExceptionHandler(array $levelMap = [], bool $callPrevious = true): self
    {
        $prev = set_exception_handler(function (\Throwable $e): void {
            $this->handleException($e);
        });
        $this->uncaughtExceptionLevelMap = $levelMap;
        foreach ($this->defaultExceptionLevelMap() as $class => $level) {
            if (!isset($this->uncaughtExceptionLevelMap[$class])) {
                $this->uncaughtExceptionLevelMap[$class] = $level;
            }
        }
        if ($callPrevious && null !== $prev) {
            $this->previousExceptionHandler = $prev(...);
        }

return $this;
    }

/**
     * @param  array<int, LogLevel::*> $levelMap an array of E_* constant to LogLevel::* constant mapping
     * @return $this
     */
    public function registerErrorHandler(array $levelMap = [], bool $callPrevious = true, int $errorTypes = -1, bool $handleOnlyReportedErrors = true): self
    {
        $prev = set_error_handler($this->handleError(...), $errorTypes);
        $this->errorLevelMap = array_replace($this->defaultErrorLevelMap(), $levelMap);
        if ($callPrevious) {
            $this->previousErrorHandler = $prev !== null ? $prev(...) : true;
        } else {
            $this->previousErrorHandler = null;
        }

$this->handleOnlyReportedErrors = $handleOnlyReportedErrors;

return $this;
    }

/**
     * @param LogLevel::*|null $level              a LogLevel::* constant, null to use the default LogLevel::ALERT
     * @param int              $reservedMemorySize Amount of KBs to reserve in memory so that it can be freed when handling fatal errors giving Monolog some room in memory to get its job done
     * @return $this
     */
    public function registerFatalHandler($level = null, int $reservedMemorySize = 20): self
    {
        register_shutdown_function($this->handleFatalError(...));

$this->reservedMemory = str_repeat(' ', 1024 * $reservedMemorySize);
        $this->fatalLevel = null === $level ? LogLevel::ALERT : $level;
        $this->hasFatalErrorHandler = true;

return $this;
    }

/**
     * @return array<class-string, LogLevel::*>
     */
    protected function defaultExceptionLevelMap(): array
    {
        return [
            'ParseError' => LogLevel::CRITICAL,
            'Throwable' => LogLevel::ERROR,
        ];
    }

/**
     * @return array<int, LogLevel::*>
     */
    protected function defaultErrorLevelMap(): array
    {
        return [
            E_ERROR             => LogLevel::CRITICAL,
            E_WARNING           => LogLevel::WARNING,
            E_PARSE             => LogLevel::ALERT,
            E_NOTICE            => LogLevel::NOTICE,
            E_CORE_ERROR        => LogLevel::CRITICAL,
            E_CORE_WARNING      => LogLevel::WARNING,
            E_COMPILE_ERROR     => LogLevel::ALERT,
            E_COMPILE_WARNING   => LogLevel::WARNING,
            E_USER_ERROR        => LogLevel::ERROR,
            E_USER_WARNING      => LogLevel::WARNING,
            E_USER_NOTICE       => LogLevel::NOTICE,
            E_STRICT            => LogLevel::NOTICE,
            E_RECOVERABLE_ERROR => LogLevel::ERROR,
            E_DEPRECATED        => LogLevel::NOTICE,
            E_USER_DEPRECATED   => LogLevel::NOTICE,
        ];
    }

private function handleException(\Throwable $e): never
    {
        $level = LogLevel::ERROR;
        foreach ($this->uncaughtExceptionLevelMap as $class => $candidate) {
            if ($e instanceof $class) {
                $level = $candidate;
                break;
            }
        }

$this->logger->log(
            $level,
            sprintf('Uncaught Exception %s: "%s" at %s line %s', Utils::getClass($e), $e->getMessage(), $e->getFile(), $e->getLine()),
            ['exception' => $e]
        );

if (null !== $this->previousExceptionHandler) {
            ($this->previousExceptionHandler)($e);
        }

if (!headers_sent() && in_array(strtolower((string) ini_get('display_errors')), ['0', '', 'false', 'off', 'none', 'no'], true)) {
            http_response_code(500);
        }

exit(255);
    }

private function handleError(int $code, string $message, string $file = '', int $line = 0): bool
    {
        if ($this->handleOnlyReportedErrors && 0 === (error_reporting() & $code)) {
            return false;
        }

// fatal error codes are ignored if a fatal error handler is present as well to avoid duplicate log entries
        if (!$this->hasFatalErrorHandler || !in_array($code, self::FATAL_ERRORS, true)) {
            $level = $this->errorLevelMap[$code] ?? LogLevel::CRITICAL;
            $this->logger->log($level, self::codeToString($code).': '.$message, ['code' => $code, 'message' => $message, 'file' => $file, 'line' => $line]);
        } else {
            $trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
            array_shift($trace); // Exclude handleError from trace
            $this->lastFatalData = ['type' => $code, 'message' => $message, 'file' => $file, 'line' => $line, 'trace' => $trace];
        }

if ($this->previousErrorHandler === true) {
            return false;
        }
        if ($this->previousErrorHandler instanceof Closure) {
            return (bool) ($this->previousErrorHandler)($code, $message, $file, $line);
        }

return true;
    }

/**
     * @private
     */
    public function handleFatalError(): void
    {
        $this->reservedMemory = '';

if (is_array($this->lastFatalData)) {
            $lastError = $this->lastFatalData;
        } else {
            $lastError = error_get_last();
        }
        if (is_array($lastError) && in_array($lastError['type'], self::FATAL_ERRORS, true)) {
            $trace = $lastError['trace'] ?? null;
            $this->logger->log(
                $this->fatalLevel,
                'Fatal Error ('.self::codeToString($lastError['type']).'): '.$lastError['message'],
                ['code' => $lastError['type'], 'message' => $lastError['message'], 'file' => $lastError['file'], 'line' => $lastError['line'], 'trace' => $trace]
            );

if ($this->logger instanceof Logger) {
                foreach ($this->logger->getHandlers() as $handler) {
                    $handler->close();
                }
            }
        }
    }

private static function codeToString(int $code): string
    {
        return match ($code) {
            E_ERROR => 'E_ERROR',
            E_WARNING => 'E_WARNING',
            E_PARSE => 'E_PARSE',
            E_NOTICE => 'E_NOTICE',
            E_CORE_ERROR => 'E_CORE_ERROR',
            E_CORE_WARNING => 'E_CORE_WARNING',
            E_COMPILE_ERROR => 'E_COMPILE_ERROR',
            E_COMPILE_WARNING => 'E_COMPILE_WARNING',
            E_USER_ERROR => 'E_USER_ERROR',
            E_USER_WARNING => 'E_USER_WARNING',
            E_USER_NOTICE => 'E_USER_NOTICE',
            E_STRICT => 'E_STRICT',
            E_RECOVERABLE_ERROR => 'E_RECOVERABLE_ERROR',
            E_DEPRECATED => 'E_DEPRECATED',
            E_USER_DEPRECATED => 'E_USER_DEPRECATED',
            default => 'Unknown PHP error',
        };
    }
}