Everything has the potential of being insecure, and not because it is in PHP or some other language. A poorly locked down server, for instance can be a far greater threat, imho, than using any online billing software, regardless of it's strengths and weeknesses.
As SoftDux points out/alludes to, if you need to evaluate the code, and are up to the level, you can take your own precautions using open-sourced solutions, such as SolidState, which in my opinion, has a lot of promise.
Nevertheless, you've got to go with what you feel comfortable with and that fits your business model.
As SoftDux points out/alludes to, if you need to evaluate the code, and are up to the level, you can take your own precautions using open-sourced solutions, such as SolidState, which in my opinion, has a lot of promise.
Nevertheless, you've got to go with what you feel comfortable with and that fits your business model.