Contact PHP is also 1.5, want to ask the next who should be in what aspects of learning what knowledge

Contact PHP is also 1.5, want to ask the next who should be in what aspects of learning what knowledge
Learn PHP 1.5, more than a year of time in the enterprise project growth. Access to some of the technology, usually the web development skills are generally known, but all feel is not very deep, now is a bit confused, do not know how to go to the goal of how to move forward, there have been the guidance twos, thank you!

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If you don't feel deep, go deep.
Isn't it just a website? I don't need anything advanced.
You know what people are thinking and doing is enough.
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Build your own framework to fulfill your business logic needs.

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