var in class definition

Anon

Hello,

Why would one use var definitions in a class? I've played around with it but it doesnt seem to do anything (ie. making it public or private).

Thanks in advance

Anon

class foo()
{
var $bar;

function foo()
{
$this->bar="whatever";
}
}

Are you talking about the var $bar; part? Why would you do that?

If you create a new class and want to echo $bar, you'd have to do it this way, correct??

$obj = new foo();
echo $obj->bar;
//Should echo "whatever"

Maybe I'm missing something.....

---John Holmes

Anon

Exactly... why put the "var $bar;" part in there at all? Without it it works fine as well....

Anon

I guess it's just a carry over from C++ style programming...

---JH

Anon

So this means I can leave it out of the source or does it make the var private or?????
I do not think it is there just for fun (;

Anon

I just tried this code and it worked...I don't think you can make any of the variables private in an object (??)

<?php

class foo
{
function foo()
{
$this->bar = "something";
}
}

$obj = new foo();

echo $obj->bar;

$obj->blah = "else";

echo $obj->blah;

It printed out somethingelse....

next comment......

---John Holmes...

Anon

Yes, it does work without using var... that's why I don't understand why "var" even exists... Thanks for your help...

Anon

var inside of a class allows you to establish a private variable within the class that can be used within any function of the class for instance in the following example I need to upload files in all of the functions and don't want to have to use a global variable and I don't want to have to redeclare the variable each time in each function I could set a class var

class test {
var $uploaddir = "pathtouploaddir";

function upload($file) {
copy($file, $this->uploaddir."/".$file_name);
}
function delete($file) {
unlink($this->uploaddir."/".$file);
}
}

Anon

The variable isn't private though. You can use it outside of the class and you can modify it's value. This works:

<?php

class foo
{
var $test = "data";

function foo()
{
	$this->bar="something";
}

}
$obj = new foo();

echo $obj->bar . "<BR>"; //prints "something"
echo $obj->test . "<BR>"; //prints "data"

$obj->bar = "nothing";
$obj->test = "no-data";
echo $obj->bar . "<BR>"; //prints "nothing"
echo $obj->test . "<BR>"; //prints "no-data"

---John Holmes...