Symfony\Component\DependencyInjection\Dumper\PhpDumper::dumpValue PHP Method

    private function dumpValue($value, $interpolate = true)
    {
        if (is_array($value)) {
            $code = array();
            foreach ($value as $k => $v) {
                $code[] = sprintf('%s => %s', $this->dumpValue($k, $interpolate), $this->dumpValue($v, $interpolate));
            }

            return sprintf('array(%s)', implode(', ', $code));
        } elseif ($value instanceof Definition) {
            if (null !== $this->definitionVariables && $this->definitionVariables->contains($value)) {
                return $this->dumpValue($this->definitionVariables->offsetGet($value), $interpolate);
            }
            if (count($value->getMethodCalls()) > 0) {
                throw new RuntimeException('Cannot dump definitions which have method calls.');
            }
            if (null !== $value->getConfigurator()) {
                throw new RuntimeException('Cannot dump definitions which have a configurator.');
            }

            $arguments = array();
            foreach ($value->getArguments() as $argument) {
                $arguments[] = $this->dumpValue($argument);
            }

            if (null !== $value->getFactory()) {
                $factory = $value->getFactory();

                if (is_string($factory)) {
                    return sprintf('%s(%s)', $this->dumpLiteralClass($this->dumpValue($factory)), implode(', ', $arguments));
                }

                if (is_array($factory)) {
                    if (!preg_match('/^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*$/', $factory[1])) {
                        throw new RuntimeException(sprintf('Cannot dump definition because of invalid factory method (%s)', $factory[1] ?: 'n/a'));
                    }

                    if (is_string($factory[0])) {
                        return sprintf('%s::%s(%s)', $this->dumpLiteralClass($this->dumpValue($factory[0])), $factory[1], implode(', ', $arguments));
                    }

                    if ($factory[0] instanceof Definition) {
                        return sprintf("call_user_func(array(%s, '%s')%s)", $this->dumpValue($factory[0]), $factory[1], count($arguments) > 0 ? ', '.implode(', ', $arguments) : '');
                    }

                    if ($factory[0] instanceof Reference) {
                        return sprintf('%s->%s(%s)', $this->dumpValue($factory[0]), $factory[1], implode(', ', $arguments));
                    }
                }

                throw new RuntimeException('Cannot dump definition because of invalid factory');
            }

            $class = $value->getClass();
            if (null === $class) {
                throw new RuntimeException('Cannot dump definitions which have no class nor factory.');
            }

            return sprintf('new %s(%s)', $this->dumpLiteralClass($this->dumpValue($class)), implode(', ', $arguments));
        } elseif ($value instanceof Variable) {
            return '$'.$value;
        } elseif ($value instanceof Reference) {
            if (null !== $this->referenceVariables && isset($this->referenceVariables[$id = (string) $value])) {
                return $this->dumpValue($this->referenceVariables[$id], $interpolate);
            }

            return $this->getServiceCall((string) $value, $value);
        } elseif ($value instanceof Expression) {
            return $this->getExpressionLanguage()->compile((string) $value, array('this' => 'container'));
        } elseif ($value instanceof Parameter) {
            return $this->dumpParameter($value);
        } elseif (true === $interpolate && is_string($value)) {
            if (preg_match('/^%([^%]+)%$/', $value, $match)) {
                // we do this to deal with non string values (Boolean, integer, ...)
                // the preg_replace_callback converts them to strings
                return $this->dumpParameter(strtolower($match[1]));
            } else {
                $replaceParameters = function ($match) {
                    return "'.".$this->dumpParameter(strtolower($match[2])).".'";
                };

                $code = str_replace('%%', '%', preg_replace_callback('/(?<!%)(%)([^%]+)\1/', $replaceParameters, $this->export($value)));

                return $code;
            }
        } elseif (is_object($value) || is_resource($value)) {
            throw new RuntimeException('Unable to dump a service container if a parameter is an object or a resource.');
        } else {
            return $this->export($value);
        }
    }