Globals..

Anon

If I declare a global variable at the beginning of the script, is should go in and out of functions without a problem? correct? because I can't seem to get it to work 🙁

Anon

It should!

reagent

No, that is false. The keyword 'global' is confusing:

<?php
global $myVar;
$myVar = 12;

function myFunction()
{
print $myVar;
}
myFunction();
?>

this will not do anything. $myVar has no value inside the function. Instead try this (notice the placement of the global keyword):

<?php

$myVar = 12;

function myFunction()
{
global $myVar;
print $myVar;
}
myFunction();
?>

using global inside functions gives access to variables declared outside the scope of the function. It does NOT declare a variable as a GLOBAL variable! It's confusing, but I hope that helped.

marinelife

Is there any way in PHP to declare a global variable within a file and then have it globally available to any other php file on a site?

Anon

Is there anyway to make a real global variable?

Anon

session variables in PHP4 will easily create this type of variable...you must start the session, register the variable, then assign a value to the variable.

Then on any other page, just pick up the session again and call your variable as if it was local!

<?
session_start();
session_register("foo");

$foo = "hello world";

<?
session_start();

echo $foo;

//prints "hello world";

Anon

Sorry, I assumed Josh did it like in the second example!

By the way, what result gives you the first example?

I assume it leads to nothing dowan't it?

Anon

Ya, thats about right 🙁

Anon

why not create a FUNCTION and have your globals within said FUNCTION and then at the start of all your scripts just call to that FUNCTION.....i would think that will work ...right?

good luck
jay

Anon

Actually all session var and global vars are not accessable to a function within a class file. You must pass the value into the function as an argument. This is a good thing. It is bad practice to code using global vars.

hth

pete.