include_path and php

[Scott Johnson <sjohnson@xxxxxxxxxxxxxxx>]

I am having a heck of a time trying to figure out how to set the include_path 
setting in the php.ini file. Where does this setting default to or "start" from?

I have a index.php page that has the following:
  <BR><?php include ("random_quote.php") ?><BR>


When this runs I get the following errors:
"Warning: main(random_quote.php) [function.main]: failed to open stream: No such 
file or directory in /www/webphpsvr/htdocs/index.php on line 20
Warning: main() [function.include]: Failed opening 'random_quote.php' for 
inclusion (include_path='.:/usr/local/php5//lib/php') in 
/www/webphpsvr/htdocs/index.php on line 20"

Here is what is in random_quote.php:
<?php

/**
 * Add this line of code in your page:
 * <?php include "random_quote.php"; ?>
 */

$quotes[] = "This is a quote";
$quotes[] = "This is another";
$quotes[] = "quote 3";
$quotes[] = "quote 4";
$quotes[] = "quote 5";
$quotes[] = "quote 6";

srand ((double) microtime() * 1000000);
$randomquote = rand(0,count($quotes)-1);

echo "<p>" . $quotes[$randomquote] . "</p>";

?>