quick question about -> in a class extend

VisionsOfCody

I'm trying to get to grips with classes and I've just seen a line of code in an extend for a class that looks like this

$this->cObj->data['pages']

what i don't understand is why there are two ->

why has that been used and is this quite common ?

thanks

laserlight

$x = $this->cObj->data['pages'];

can be written as:

$obj = $this->cObj;
$x = $obj->data['pages'];

except that the former does not need an intermediate variable $obj.

VisionsOfCody

ok thanks

i think that's clear, lol !

laserlight

You're welcome, remember to mark this thread as resolved.

NogDog

Note that if, in this example, "cObj" is a method, then such a pattern will work in PHP5 but not in PHP4. In PHP4 you would need to use the two-line technique that Laserlight provided as an explanation.