PHP access globals from within class

[mike_g]

I have a class that basically just holds a set of functions within the classes namespace. I have some globals set in a configuration file. My problem is that I cant seem to access the globals from within the scope of my class; however, I dont seem to have a problem accessing Joomla variables so there must be something that I am doing wrong. Heres a reduced example of my code:


$myGlobalVar = 10;
comCompo::printGlobal();

class comCompo
{
function printGlobal()
{
global $myGlobalVar;
echo $myGlobalVar; // <- does nothing
}
}

[dgoosens]

this is quite logic actualy...
classes aren't functions... they don't know what happens outside their instances...

EDIT: this would not work with functions either...

You should do something like this:



<?php

class comCompo
{
private $globalVar = 10;

public function printGlobal()
{
print $globalVar;
}
}

comCompo::printGlobal();

?>


but this class doesn't make a lot of sense...
you might want to add a constructor or a set function otherwise you will not be able to modify $globalVar



<?php

class comCompo
{
private $globalVar = 10; //10 being the default value

public function __constructor($globalVar)
{
$this->globalVar = $globalVar;
}

public function printGlobal()
{
print $globalVar;
}
}

comCompo::printGlobal(); // will output '10'

//or
$myGlobalVar = new comCompo(15);
$myGlobalVar->printGlobal(); // will output '15'

?>

[mike_g]

Thanks for the reply. I was hoping to be able to avoid having to create an instance of my class as I'm calling functions from it like: comCompo::printGlobal(); all over the place and it would require making changes to all the calls. I guess that if this is the only way to go about this then making the changes sooner would be better than later.

[dgoosens]

in that case, just start a session and set a variable...



<?php

session_start();

$_SESSION['globalVar'] = 10;

?>


then you can simply access this directly or with a function as long as the session remains active...



function printGlobalVar()
{
print_r($_SESSION['globalVar']);
}

printGlobalVar();

//or

print_r($_SESSION['globalVar']);

[mike_g]

Lol, yeah nice idea. Why dident I think of that? >_<

[dgoosens]

i know...

always keep in mind
KISS = Keep It Simple Stupid !

[drubin]

Also note that sessions are used for persistent storage and not for global vars.

Sessions (http://www.php.net/manual/en/session.examples.php)
Global (http://www.php.net/global)