code that refers to variables in the base class

[mazsolt]

hello,

I have 2 classes:

class a{
var $x=1;
}

class b extends a{
var $x=2;
function display(){
echo $this->x," ",$this::name;
}
}

The documentation writes, that you can refer to the variables in the base class with the operator '::'. If I wrote:

$q=new b;
$q->display();

I received:
Parse error: parse error, unexpected T_PAAMAYIM_NEKUDOTAYIM, expecting ',' or ';'

I changed the code of the display() function, trying:
echo $this->x," ",a::name;
or:
echo $this->x," ",a::$name;
but it didn't work.

Can anyone tell me how to refer to a variable from the base class? I'm interested about variables which are redefined in the child class, because the other variables are inherited anyway.

[ahundiak]

I went through the object section of the manual again. The only references I found indicated that you could call a base class's functions using the :: syntax.

class A
{
var $x = 1;
function getX() { return $this->x; }
}

echo A::getX();

But I am not sure if this is really what you want. The B class is only going to have 1 $x variable. There is not going to be a A::x and a B::x variable.

I was also a bit surprised that when I ran your example, A::getX() turned out to be 2. I would have thought it would have stayed at 1.

[ednark]

you may have to use the [man]get_class_vars/man function to get what you want

see if any of these are what you are looking for

output:

A has a
B has b
A has
A has b
A has b
Array ( [x] => a )
Array ( [x] => b )

<?php

class A
{
    var $x = 'a';

function display()
{
    echo "A has ". $this->x;
}
}

class B extends A
{
    var $x = 'b';

function display()
{
    echo "B has ". $this->x ;
}

function displayParent()
{
    parent::display();
}

function displayA()
{
    A::display();
}
} 

$a = new A();
$a->display();

echo "<br />\n";

$b = new B();
$b->display();

echo "<br />\n";

   echo A::display();

echo "<br />\n";

   echo $b->displayParent();

echo "<br />\n";

   echo $b->displayA();

echo "<br />\n";

$a_vars = get_class_vars('A');
print_r($a_vars);

echo "<br />\n";

$b_vars = get_class_vars('B');
print_r($b_vars);

?>