Accessing a function from anothe PHP file

[kinetic1]

A have two files on the same server,

How do i access a function on one PHP file from another...
Ah... the function has input values and a return value.

thx
^_

[devinemke]

[man]include[/man]

[kinetic1]

i keep getting :

Fatal error: Call to undefined function zzz()

In file a.php:

<?php

function yyy($x) {
  include "b.php";
  zzz($x);
}

yyy('hihi');

?>

in file b.php:

<?php

function zzz($x) {
  echo $x;
}

?>

if I cut the function and put it in the same file it'll work... (OBVIOSLY)

thx
^_

[devinemke]

works on my box:
WinXP
Apache 2
PHP 5.0.3 (with error_reporting E_ALL)