checkNonScalar example

public function generate(ControllerReference $controller, Request $request = null, bool $absolute = false, bool $strict = true, bool $sign = true): string
    {
        if (null === $request && (null === $this->requestStack || null === $request = $this->requestStack->getCurrentRequest())) {
            throw new \LogicException('Generating a fragment URL can only be done when handling a Request.');
        }

        if ($sign && null === $this->signer) {
            throw new \LogicException('You must use a URI when using the ESI rendering strategy or set a URL signer.');
        }

        if ($strict) {
            $this->checkNonScalar($controller->attributes);
        }

        // We need to forward the current _format and _locale values as we don't have         // a proper routing pattern to do the job for us.         // This makes things inconsistent if you switch from rendering a controller         // to rendering a route if the route pattern does not contain the special         // _format and _locale placeholders.         if (!isset($controller->attributes['_format'])) {
            $controller->attributes['_format'] = $request->getRequestFormat();
        }
        if (!isset($controller->attributes['_locale'])) {
            

public function generate(ControllerReference $controller, Request $request = null, bool $absolute = false, bool $strict = true, bool $sign = true): string
    {
        if (null === $request && (null === $this->requestStack || null === $request = $this->requestStack->getCurrentRequest())) {
            throw new \LogicException('Generating a fragment URL can only be done when handling a Request.');
        }

        if ($sign && null === $this->signer) {
            throw new \LogicException('You must use a URI when using the ESI rendering strategy or set a URL signer.');
        }

        if ($strict) {
            $this->checkNonScalar($controller->attributes);
        }

        // We need to forward the current _format and _locale values as we don't have         // a proper routing pattern to do the job for us.         // This makes things inconsistent if you switch from rendering a controller         // to rendering a route if the route pattern does not contain the special         // _format and _locale placeholders.         if (!isset($controller->attributes['_format'])) {
            $controller->attributes['_format'] = $request->getRequestFormat();
        }
        if (!isset($controller->attributes['_locale'])) {