How to use multiple arrows when working with an object?

[minitauros]

In the ZEND Reference Guide I saw this:

$select = $db->select()->from('posts')->order('date_created DESC');

Now I'm wondering: what does that second arrow do? What does using more than one arrow when working with an object do? And can I use it all the times? For example

$myclass->function()->anotherfunction()->hello;

?

[cereal]

This is called Method Chaining and yes, you can use it whenever you want if the class is built in the right way. Check this comment on PHP Manual: http://www.php.net/manual/en/language.operators.php#87904
bye.

[minitauros]

Great, that's what I wanted to know, thanks! :)