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I have a site with php+mysql on shared hosting and it works well, has good traffic and I want to plan for the future when traffic to my site grows and shared hosting can't handle it.
Since the code is not trivial, rewriting is not an option, so I'd like to plan for a future site upgrade which considers these parameters:
- The site should not be rewritten, I'd like to move the existing code over to the new hosting as is (with minor modifications at most) when the time comes
- I'm the only developer/admin on the site and it works out well, because shared hosting is PaaS, so I don't need to bother with administering the base software, installing software updates, etc. so the new future hosting should be PaaS as well
- It should not be too expensive, so a managed VPS and such is not an option
What are the possible hosting options which would satisfy the above conditions and allow me to handle more traffic when needed?