Zephir\Optimizers\FunctionCall\ObStart::optimize PHP Method

    public function optimize(array $expression, Call $call, CompilationContext $context)
    {
        if (!isset($expression['parameters'])) {
            return false;
        }
        if (count($expression['parameters']) > 0) {
            return false;
        }
        $context->headersManager->add('kernel/array');
        $resolvedParams = $call->getReadOnlyResolvedParams($expression['parameters'], $context, $expression);
        return new CompiledExpression('null', 'zephir_ob_start(TSRMLS_C)', $expression);
    }