PHP IP Allow

I was wondering how to allow IP addresses to view my page. I want to make a list of IPs that are allowed, and all others will be blocked. I also would like to call on that PHP file from Flash, and if the IP is allowed, the Flash will go to a specified frame number. Does anyone have any idea on how to do this?

EDIT: Here is my current code:

<?
$allow[0]="0.0.0.0"; 
if (in_array($_SERVER['REMOTE_ADDR'],$allow)) 
{ 
echo "Welcome" ;
}
else echo "You are not authorized to view this page."
?>

PHP:

 

Should work just fine.

<?php

$allowed = array('127.0.0.1');

if ( !in_array($_SERVER['REMOTE_ADDR'], $allowed) )
	die('You\'re not allowed here.');
	
/* otherwise put the rest of your code here */
// _stuff(); more_stuff($var);

PHP:

Makes a code for easier reading, after the die statement just put any code you want if they're valid.

Could you use a AJAX request via Flash (not familar with flash personally) to get the page, although I fear this could be easily spoofed.

 

I don't know. I just want to call the PHP file from Flash and if the user is allowed, the Flash goes to frame 2. If not, frame 3.