Global variables HELP!!

dloeppky

Hi all,

I want to use a global variable as follows:

// declare how??
$custnum

function1()
{

$custnum = somevalue;
}

function2()
{
$func1custnum = $custnum;
or
$echo $custnum;
}

What do I have to do? An example would be very helpful.

Cheers,
David

Stinger51

The $custnum is fine the way you have it. I believe some older versions of PHP required the keyword "global" here, but not anymore (not sure).

The important thing is, you must also redeclare this variable inside of each function declaration as :

function1()
{

global $custnum;
$custnum = somevalue;
}

Otherwise, your function will be working with a local variable, NOT the global one. PHP functions, unlike C++, do not see these global variables unless you declare them as such inside the function.

Stinger51

Check out this book by Julie Maloni. Best I've ever seen for getting started with PHP and MySQL. Comes with a CD ROM and installation programs for Apache, MySQL, and PHP 4.0.

The first half of the book is an intro to using PHP, very easy reading and well written. The second half is all about MySQL. She shows you how to build a Phone Book system that actually works. This would be a good primer for building a Guest Book later on.

Enjoy.

dloeppky

Hi,

I've tried that -- nothing. I don't know what the problem is, ack! And yes, I do have register globals on. It won't display the value outside function1 or inside function2.

Any other ideas?

Cheers,
David

Originally posted by Stinger51
The $custnum is fine the way you have it. I believe some older versions of PHP required the keyword "global" here, but not anymore (not sure).

The important thing is, you must also redeclare this variable inside of each function declaration as :

function1()
{

global $custnum;
$custnum = somevalue;
}

Otherwise, your function will be working with a local variable, NOT the global one. PHP functions, unlike C++, do not see these global variables unless you declare them as such inside the function.

Sxooter

You should really try this new thing guys, it's called reading the fine manual. It's an old internet tradition, and it's a simple two step process. 1: Find it, 2: Read it.

I've already done step one for ya:

http://www.php.net/manual/en/language.variables.scope.php