trying to understand global vars... EZ!

[bmarker]

I don't understand why this doesn't work, I"ve checked the doc. but still can't grasp it.

<?
global $dogtrash='my global var';

function getGlobal(){
	echo("$dogtrash");
} 
getGlobal();
?>

I've also tried

$GLOBALS['$dogtrash']='my global var';

How would U guys recommend doing the first code block to access the var inside the function? If it matters I"m using PHP4

[Rodney_H_]

Here are three ways to do this that will work:

1) Create global var inside function:

<?php
// define function
function getGlobal(){
	// establish a global variable
	global $dogtrash;
	// assign the global variable a value
	$dogtrash = 'my global var';
	// echo global var
	echo $dogtrash;
}

// call function
getGlobal();

?>

Or the use of a CONSTANT, which are global in scope, and use that in your function:

<?php
// define a constant
	define('DOGTRASH','my global var');

// define function
function getGlobal2(){
	// echo Constant
	echo DOGTRASH;
}

// call function
getGlobal2();
?>

Or, create the function to accept arguments, and you can set defaults, too:

<?php
// define function with an arguments
function getGlobal3($var = 'dogtrash', $val = 'my global var'){
	//define global var
	global $var;

// assing var a value
$var = $val;

// echo var
echo $var;
}
// call function
getGlobal3();
?>

... or....

[execute]

yea or you can look into classes, and learn that. Which then you set the vars at the top of the class like:
var $var;
and then access it in any function INSIDE the class, using $this->var;

[bmarker]

What's a good resource for PHP5 w/ classes? I come from flash development so that may be better suited towards me.

[suntra]

Very easy !

<?
global $dogtrash='my global var';

function getGlobal(){
	echo $GLOBALS['dogtrash'];
} 
getGlobal();
?>

-- OR --

<?
global $dogtrash='my global var';

function getGlobal(){
	global $dogtrash;
	echo $dogtrash;
} 
getGlobal();
?>

[bmarker]

thanks Suntra!