['Error', RfcLogLevel::ERROR], E_WARNING => ['Warning', RfcLogLevel::WARNING], E_PARSE => ['Parse error', RfcLogLevel::ERROR], E_NOTICE => ['Notice', RfcLogLevel::NOTICE], E_CORE_ERROR => ['Core error', RfcLogLevel::ERROR], E_CORE_WARNING => ['Core warning', RfcLogLevel::WARNING], E_COMPILE_ERROR => ['Compile error', RfcLogLevel::ERROR], E_COMPILE_WARNING => ['Compile warning', RfcLogLevel::WARNING], E_USER_ERROR => ['User error', RfcLogLevel::ERROR], E_USER_WARNING => ['User warning', RfcLogLevel::WARNING], E_USER_NOTICE => ['User notice', RfcLogLevel::NOTICE], E_STRICT => ['Strict warning', RfcLogLevel::DEBUG], E_RECOVERABLE_ERROR => ['Recoverable fatal error', RfcLogLevel::ERROR], E_DEPRECATED => ['Deprecated function', RfcLogLevel::DEBUG], E_USER_DEPRECATED => ['User deprecated function', RfcLogLevel::DEBUG], ]; return $types; } /** * Provides custom PHP error handling. * * @param $error_level * The level of the error raised. * @param $message * The error message. * @param $filename * The filename that the error was raised in. * @param $line * The line number the error was raised at. * @param $context * An array that points to the active symbol table at the point the error * occurred. */ function _drupal_error_handler_real($error_level, $message, $filename, $line, $context) { if ($error_level & error_reporting()) { $types = drupal_error_levels(); list($severity_msg, $severity_level) = $types[$error_level]; $backtrace = debug_backtrace(); $caller = Error::getLastCaller($backtrace); // We treat recoverable errors as fatal. $recoverable = $error_level == E_RECOVERABLE_ERROR; // As __toString() methods must not throw exceptions (recoverable errors) // in PHP, we allow them to trigger a fatal error by emitting a user error // using trigger_error(). $to_string = $error_level == E_USER_ERROR && substr($caller['function'], -strlen('__toString()')) == '__toString()'; _drupal_log_error([ '%type' => isset($types[$error_level]) ? $severity_msg : 'Unknown error', // The standard PHP error handler considers that the error messages // are HTML. We mimick this behavior here. '@message' => Markup::create(Xss::filterAdmin($message)), '%function' => $caller['function'], '%file' => $caller['file'], '%line' => $caller['line'], 'severity_level' => $severity_level, 'backtrace' => $backtrace, '@backtrace_string' => (new \Exception())->getTraceAsString(), ], $recoverable || $to_string); } // If the site is a test site then fail for user deprecations so they can be // caught by the deprecation error handler. elseif (DRUPAL_TEST_IN_CHILD_SITE && $error_level === E_USER_DEPRECATED) { $backtrace = debug_backtrace(); $caller = Error::getLastCaller($backtrace); _drupal_error_header( Markup::create(Xss::filterAdmin($message)), 'User deprecated function', $caller['function'], $caller['file'], $caller['line'] ); } } /** * Determines whether an error should be displayed. * * When in maintenance mode or when error_level is ERROR_REPORTING_DISPLAY_ALL, * all errors should be displayed. For ERROR_REPORTING_DISPLAY_SOME, $error * will be examined to determine if it should be displayed. * * @param $error * Optional error to examine for ERROR_REPORTING_DISPLAY_SOME. * * @return * TRUE if an error should be displayed. */ function error_displayable($error = NULL) { if (defined('MAINTENANCE_MODE')) { return TRUE; } $error_level = _drupal_get_error_level(); if ($error_level == ERROR_REPORTING_DISPLAY_ALL || $error_level == ERROR_REPORTING_DISPLAY_VERBOSE) { return TRUE; } if ($error_level == ERROR_REPORTING_DISPLAY_SOME && isset($error)) { return $error['%type'] != 'Notice' && $error['%type'] != 'Strict warning'; } return FALSE; } /** * Logs a PHP error or exception and displays an error page in fatal cases. * * @param $error * An array with the following keys: %type, @message, %function, %file, * %line, @backtrace_string, severity_level, and backtrace. All the parameters * are plain-text, with the exception of @message, which needs to be an HTML * string, and backtrace, which is a standard PHP backtrace. * @param bool $fatal * TRUE for: * - An exception is thrown and not caught by something else. * - A recoverable fatal error, which is a fatal error. * Non-recoverable fatal errors cannot be logged by Drupal. */ function _drupal_log_error($error, $fatal = FALSE) { $is_installer = drupal_installation_attempted(); // Backtrace array is not a valid replacement value for t(). $backtrace = $error['backtrace']; unset($error['backtrace']); // When running inside the testing framework, we relay the errors // to the tested site by the way of HTTP headers. if (DRUPAL_TEST_IN_CHILD_SITE && !headers_sent() && (!defined('SIMPLETEST_COLLECT_ERRORS') || SIMPLETEST_COLLECT_ERRORS)) { _drupal_error_header($error['@message'], $error['%type'], $error['%function'], $error['%file'], $error['%line']); } $response = new Response(); // Only call the logger if there is a logger factory available. This can occur // if there is an error while rebuilding the container or during the // installer. if (\Drupal::hasService('logger.factory')) { try { // Provide the PHP backtrace to logger implementations. \Drupal::logger('php')->log($error['severity_level'], '%type: @message in %function (line %line of %file) @backtrace_string.', $error + ['backtrace' => $backtrace]); } catch (\Exception $e) { // We can't log, for example because the database connection is not // available. At least try to log to PHP error log. error_log(strtr('Failed to log error: %type: @message in %function (line %line of %file). @backtrace_string', $error)); } } // Log fatal errors, so developers can find and debug them. if ($fatal) { error_log(sprintf('%s: %s in %s on line %d %s', $error['%type'], $error['@message'], $error['%file'], $error['%line'], $error['@backtrace_string'])); } if (PHP_SAPI === 'cli') { if ($fatal) { // When called from CLI, simply output a plain text message. // Should not translate the string to avoid errors producing more errors. $response->setContent(html_entity_decode(strip_tags(new FormattableMarkup('%type: @message in %function (line %line of %file).', $error))) . "\n"); $response->send(); exit; } } if (\Drupal::hasRequest() && \Drupal::request()->isXmlHttpRequest()) { if ($fatal) { if (error_displayable($error)) { // When called from JavaScript, simply output the error message. // Should not translate the string to avoid errors producing more errors. $response->setContent(new FormattableMarkup('%type: @message in %function (line %line of %file).', $error)); $response->send(); } exit; } } else { // Display the message if the current error reporting level allows this type // of message to be displayed, and unconditionally in update.php. $message = ''; $class = NULL; if (error_displayable($error)) { $class = 'error'; // If error type is 'User notice' then treat it as debug information // instead of an error message. // @see debug() if ($error['%type'] == 'User notice') { $error['%type'] = 'Debug'; $class = 'status'; } // Attempt to reduce verbosity by removing DRUPAL_ROOT from the file path // in the message. This does not happen for (false) security. if (\Drupal::hasService('app.root')) { $root_length = strlen(\Drupal::root()); if (substr($error['%file'], 0, $root_length) == \Drupal::root()) { $error['%file'] = substr($error['%file'], $root_length + 1); } } // Check if verbose error reporting is on. $error_level = _drupal_get_error_level(); if ($error_level != ERROR_REPORTING_DISPLAY_VERBOSE) { // Without verbose logging, use a simple message. // We use \Drupal\Component\Render\FormattableMarkup directly here, // rather than use t() since we are in the middle of error handling, and // we don't want t() to cause further errors. $message = new FormattableMarkup('%type: @message in %function (line %line of %file).', $error); } else { // With verbose logging, we will also include a backtrace. // First trace is the error itself, already contained in the message. // While the second trace is the error source and also contained in the // message, the message doesn't contain argument values, so we output it // once more in the backtrace. array_shift($backtrace); // Generate a backtrace containing only scalar argument values. $error['@backtrace'] = Error::formatBacktrace($backtrace); $message = new FormattableMarkup('%type: @message in %function (line %line of %file).
@backtrace
', $error); } } if ($fatal) { // We fallback to a maintenance page at this point, because the page generation // itself can generate errors. // Should not translate the string to avoid errors producing more errors. $message = 'The website encountered an unexpected error. Please try again later.' . '
' . $message; if ($is_installer) { // install_display_output() prints the output and ends script execution. $output = [ '#title' => 'Error', '#markup' => $message, ]; install_display_output($output, $GLOBALS['install_state'], $response->headers->all()); exit; } $response->setContent($message); $response->setStatusCode(500, '500 Service unavailable (with message)'); $response->send(); // An exception must halt script execution. exit; } if ($message) { if (\Drupal::hasService('session')) { // Message display is dependent on sessions being available. \Drupal::messenger()->addMessage($message, $class, TRUE); } else { print $message; } } } } /** * Returns the current error level. * * This function should only be used to get the current error level prior to the * kernel being booted or before Drupal is installed. In all other situations * the following code is preferred: * @code * \Drupal::config('system.logging')->get('error_level'); * @endcode * * @return string * The current error level. */ function _drupal_get_error_level() { // Raise the error level to maximum for the installer, so users are able to // file proper bug reports for installer errors. The returned value is // different to the one below, because the installer actually has a // 'config.factory' service, which reads the default 'error_level' value from // System module's default configuration and the default value is not verbose. // @see error_displayable() if (drupal_installation_attempted()) { return ERROR_REPORTING_DISPLAY_VERBOSE; } $error_level = NULL; // Try to get the error level configuration from database. If this fails, // for example if the database connection is not there, try to read it from // settings.php. try { $error_level = \Drupal::config('system.logging')->get('error_level'); } catch (\Exception $e) { $error_level = isset($GLOBALS['config']['system.logging']['error_level']) ? $GLOBALS['config']['system.logging']['error_level'] : ERROR_REPORTING_HIDE; } // If there is no container or if it has no config.factory service, we are // possibly in an edge-case error situation while trying to serve a regular // request on a public site, so use the non-verbose default value. return $error_level ?: ERROR_REPORTING_DISPLAY_ALL; } /** * Adds error information to headers so that tests can access it. * * @param $message * The error message. * @param $type * The type of error. * @param $function * The function that emitted the error. * @param $file * The file that emitted the error. * @param $line * The line number in file that emitted the error. */ function _drupal_error_header($message, $type, $function, $file, $line) { // $number does not use drupal_static as it should not be reset // as it uniquely identifies each PHP error. static $number = 0; $assertion = [ $message, $type, [ 'function' => $function, 'file' => $file, 'line' => $line, ], ]; // For non-fatal errors (e.g. PHP notices) _drupal_log_error can be called // multiple times per request. In that case the response is typically // generated outside of the error handler, e.g., in a controller. As a // result it is not possible to use a Response object here but instead the // headers need to be emitted directly. header('X-Drupal-Assertion-' . $number . ': ' . rawurlencode(serialize($assertion))); $number++; }