How I Do Learn Php Quickly?

The best thing I could suggest in learning PHP is to get your hands dirty and not being afraid of asking questions and/or getting help on something you don't understand.

Start off by creating a registration form, then a log-in form and add on feature after feature and before you know it, your struggles in learning PHP would pay off.

If you are already developing in PHP enough to love it, then you already know PHP.

So you have already learned it...haven't you.