I\'ve seen this \"-> \" elsewhere used in php. One of the books I used to learn PHP has this in it, but it is never explained. What does it do, how does it work!
The
In addition to what Chacha102 said (which is the explanation for the particular case in the question you are asking), you really might want to takle a look at the PHP Manual, and its Classes and Objects (PHP 5)
It will teach you many useful things :-)
For instance, you question most certainly has it's answer in the chapter The Basics ;-)