global variables

[epimeth]

I don't understand how scope works in php... it seems to me that a variable defined outside of a function or class cannot be accessed from within it.

did I misunderstand the manual?

also, how do I add variables to the $GLOBALS array?

basically, I want to make a constant.php file and include it in a different file. When I want to access variables from constant.php do I just use the filename, or do I have to put a global before it?

[jpmoriarty]

if you include the constants.php file into your other file, then it's as if they were in the main file. Therefore you can just refer to them. in the same way though, if you're using those constants in a function then you'll either need to pass them to the funcion or global them inside the function to be able to get to them.

[sabbagh]

if you declare your variables outside the function as global you can use it anywhere and altere its values.

Include the constants.php and just use it

constants.php

<?php
define('SOMETHING', 'stupid');

?>

script.php

<?php
include("constants.php");
global $var=SOMETHING;

function use_global()
{
echo $var;
$var='more';
echo $var;
}

?>

happy coding!!

There are just 10 types of people:
-those who understand binary
-those who don't

---

José Sabbagh
Mexico City

[epimeth]

but would

function use_global()
{
echo SOMETHING;
}

work?

and how about

class myclass
{
var $v1;

myclass()
{
$this->$v1 = SOMETHING;
}
}

and you all never said how to add an element into the $GLOBAL array? simply put the keyword global in front of it? and if so, can I do

function foo()
{
global var $v1;
$v1 = 5;
}

echo $v1; //is it this
echo $GLOBALS['v1']; //or this

or will neither work?