Variables

Hi

I was wondering if this is the correct way to reference a variable from a
file that has been included inside of a function. Also just general
static/global variable usage.

For example:

Myqsql_functions.php

<?php
require("config.php")

function ach_mysqlCon()
{
static $con = mysql_connect(global
$mysql_host,$mysql_user,$mysql_pass);
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
}

function ach_mysqlCloseCon()
{
if($con)
{
mysql_close($con)
}
}
?>


And the variables are defined in config.php


config.php

<?php
//Mysql vars
$mysql_host = "localhost";
$mysql_user = "user@localhost";
$mysql_pass = "";
?>


So my questions are will ach_mysqlCloseCon() recognise the $con variable
in ach_mysqlCon() as it is declared as static? will ach_mysqlCon() recognise
the variables included from config.php as they are declared global? is this
all syntax'd properly?

Also, how would I, for example, change $mysql_host from a form?

Cheers and thanks for any and all assistance.