Newbie to PHP5

Hi there, I´m familiar with PHP syntax, but I´ve been reading some sample scripts, in PHP5 and i´ve seen some "strange" things, like diferent ways to read a collection of rows, magic functions, wrapers, and operators like "::" and "->". I know that all is the manual, but before that anyone nows, a website or a simple tutorial or explained samples, in order that the transition from PHP4 and PHP5 were easiest as possible. Thanks -- dpc