Anyone know whats the best way to learn PHP

Hi

Anyone know whats the best way to learn PHP? Every time I open an php book
or look the codes online, my mind goes "oh man, So many stuffs to learn and
gets frustrated before i even start" but on the other hand, I don't know why
some how the brain keep on nagging me to learn PHP. I guess what's the fun
way to learn php? Any good books?