Call to undefined function

I have just encountered a fatal error using file_put_contents() on a PHP4 box.
After a bit of research I found a simple function within the php.net
user comments.
I just wanted to know what happens if I then tried to run this script
on a PHP 5 box, whereby I'd be defining a function that already
exists.
Should I be changing the name of the function just in case it moves to
PHP5 in the future?
Thanks,

Tom

On Tue, 14 Nov 2006 09:36:52 +0000, Tom Chubb wrote:

> I have just encountered a fatal error using file_put_contents() on a PHP4 box.
> After a bit of research I found a simple function within the php.net
> user comments.
> I just wanted to know what happens if I then tried to run this script
> on a PHP 5 box, whereby I'd be defining a function that already
> exists.
> Should I be changing the name of the function just in case it moves to
> PHP5 in the future?
> Thanks,

Hi Tom,

if (!function_exists('file_put_contents')) {
function file_put_contents (...)
{
// Do it your way!
}
}

Ivo