Make any PHP Exception serializable by flattening complex values in backtrace.

flattenExceptionBacktrace

protected static function flattenExceptionBacktrace(Exception $exception) {
        $traceProperty = (new \ReflectionClass('Exception'))->getProperty('trace');
        $traceProperty->setAccessible(true);

        do {
            $trace = $traceProperty->getValue($exception);
            foreach($trace as &$call) {
                foreach($call['args'] as $key => $value) {
                    if ($value instanceof \Closure) {
                        $call['args'][$key] = '(Closure)';
                    } elseif (is_object($value) && !method_exists($value, '__toString')) {
                        $call['args'][$key] = sprintf('object(%s)', get_class($value));
                    } elseif (is_resource($value)) {
                        $call['args'][$key] = sprintf('resource(%s)', get_resource_type($value));
                    }
                }
            }
            $traceProperty->setValue($exception, $trace);
        } while($exception = $exception->getPrevious());

        $traceProperty->setAccessible(false);
    }