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What you need to learn depends on what your goals are, what kind of stuff you are planning to program, etc. For some applications ajax knowledge for example may be more important than knowing php very well... for others reverse may be true...
Your best bet is probably to find some quick online tutorials on each of the technologies... spend a few hours learning each, and then once you know the basics, start learning the details of whatever technology you think will be most useful to reach yoru goals...
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