[SOLVED] Scopes in PHP

[aim25]

My script has many classes and functions. After a while of coding i came up with a few questions.

 

1. If i have a variable named $temp in function A(), is it the same as the $temp in function B()?

 

class SOMETHING {

function A() {
$temp;
}

function B() {
$temp;
}

}

 

2. Lets say i have 2 classes (class A, class B) which both extend from class MAIN. In MAIN there is a variable declared; $temp. If the value of $temp is changed in class A, then accessed in class B, is the value passed between the classes?

 

class MAIN {

var $temp;

}

class A extends MAIN {

$this->temp = 4;

}

class B extends MAIN {

echo $this->temp;

}

[trq]

1: No, variables declared within functions are only available within said functions.

2: No, to achieve that class B would need to extend class A.

[aim25]

TY, that clears makes things a lot more clear.

[btherl]

To add to 2, a class definition is just a definition.  You can't set a variable in a definition of a class (except to set a default value).  You can only set a variable in an instance of a class.

 

If you have an instance of class A and an instance of class B, then their variables are totally separate, even if their classes both extended the same parent.