On the LearnComputer.com site there's a new post comparing the benefits/downfalls of online versus classroom learning of PHP development. They list a few advantages and disadvantages of each.

There can be many factors in the decision to learn PHP online or to take a class in-person, and for some, this can be a difficult decision to make. This article discusses the pros and cons of each method of PHP training to help you find the learning method that is going to suit your needs best. PHP isn't a new programming language, and there is a wealth of information on it on the web for every level of proficiency. The question is whether these resources alone are sufficient to get you up-and-running with PHP quickly.

For the "online" section advantages include flexible schedules and more up to date content. The disadvantages are things like a prerequisite knowledge of using computers/the training software and that the instructor might only have "set hours" to answer questions and offer help. The "classroom" option advantages include the motivation of a regular meeting time and fewer technology hurdles to overcome. Disadvantages include the need for a time/in-person commitment and that the focus might be higher level than needed to appeal to a more mass audience.