You can't use Adobe Photoshop online.
There are some online image editing sites (ie. pixenate.com) that are capable of performing simple edits like zoom and crop, brighten/darken, red-eye removal etc, but the best of these are nowhere near Photoshop in terms of functionality.
Yes, Photoshop can be downloaded online. Visit photoshop's official webpage for details on how to do this. Photoshop will cost several hundred dollars.
One very good free alternative to Photoshop is Gimp. There is also Gimp Shop that is a Gimp that looks similar to Photoshop.
There are a lot of tutorials on Photoshop available online. You can choose to learn directly from Adobe.com. They have a tutorial on learning Photoshop on their website. Lynda.com also has tutorials on Photoshop and other software or programs you might be interested in.
Yes there are a few different places online where you can take online training courses in photoshop. One of the places you can check out is: http://www.rasmussen.edu/
You can purchase photoshop online at many online retailers. You can purchase photoshop directly from the Adobe website, or from authorized retailers such as Best Buy.
Examples of bad photoshop can be viewed online at Hong Kiat, PS Disasters, The Berry, Daily Dawdle, Good Bad Photoshop, Bored Panda and College Humor.
Photoshop online does have small fees associated with the usage of the program however you can download the free trial but will not have all the options as the paid program. You can easily use Photoshop Online version at toolpic.com in free of cost and if you are not pro it can be best editor for you
Free Photoshop site is Photoshop online. You must create Adobe ID in order to use it. See related links.
There are various online sources where one can find Adobe Photoshop shapes. For example, the Adobe website itself has many custom shapes for Photoshop, while there are many others such as Akvis and About.
picures
Adobe photoshop can be purchased certain places online. You can also purchase the software program in the store, but it is cheaper to download off the internet.
Free photoshop training online can be found almost everywhere. If you would like to learn a certain action in photoshop, I highly suggest googling your question, there is a great chance that someone else has either created a tutorial or has step by step answers as to how to get the effect you are looking for with your photoshop version.