I suspect that I'm about to open a can of worms here, insofar as I suspect there will be a number of correct and perfectly valid answers to the following question, but:
I've been working with PHP for a couple of years now, mainly just in my own spare time as I work for a company that uses .NET technologies, but I'd like to move my knowledge one step further and put myself on the right track to learn professional coding practices and PHP skills that would be useful in a commercial PHP development team.
With this in mind, can anybody suggest an industry recognised training route (something similar to the .NET certs, for example)? Are there any industry recognised IDEs or frameworks that it would beneficial to learn?
I'll have to fund everything myself, so money will definitely be an object , but I'd really like to gain the PHP experience (albeit non-commercial at this stage) that would be attractive to an employer.
I realise that this is a very open ended sort of question, and I've already read a little bit about frameworks such as Zend, but I'd love to hear some opinions from all you 'clued-up' folks so that I can see things from a broader perspective.