I'm planning a web development and was considering ASP.NET/MS-SQL. When I started to consider the cost of expansion I realised that it could quickly stretch into the hundreds of thousands just to support several geographic clusters that failover. So out will go my copy of Visual Studio, SQL 2008 and Server 2008 licenses and I welcome in PHP/MySQL/CentOS.
Question is, where do I start? I need a good IDE for PHP/MySQL, something with similarly intuitive tools as MS Visual Studio and MS SQL Management Studio. I'd also apreciate a recommendtaion on a learning path as I was planning to follow the Microsoft Certified path in ASP.NET and SQL DB developer to give me the foundation I needed. I need to get deep into it, but I have developed for web before (only in ASP/XHTML)
Also, is MySQL likely to go out of the Window now that Sun have been taken over by Oracle?