Which is better php or nodejs as backend?

It depends on the specific use case and requirements of the project. Both PHP and Node.js are popular technologies for building backend systems, and each has its own strengths and weaknesses.

PHP is a mature and stable technology that has been widely adopted for building dynamic websites and applications. It is well-suited for projects that require tight integration with databases and server-side processing.

Node.js, on the other hand, is a JavaScript-based technology that excels at building scalable, real-time applications, such as chat applications and real-time data streaming. Node.js is well-suited for projects that require high levels of concurrency and a high-performance event-driven architecture.

In conclusion, the choice between PHP and Node.js as a backend technology will depend on the specific requirements and needs of the project. It is important to evaluate both technologies based on the features and functionality required, as well as the specific performance and scalability needs of the project