ถามเรื่อง Apache Using 404 Error URL Rewrite - SEO Friendly URL for PHP

# Some examples:
#ErrorDocument 500 "The server made a boo boo."
#ErrorDocument 404 /index.php
#ErrorDocument 404 "/cgi-bin/missing_handler.pl"
#ErrorDocument 402 http://www.example.com/subscription_info.html
#

<?
header('HTTP/1.1 200 OK');

echo "Now URL = ".$_SERVER['REQUEST_URI'];


//*** Link Page ***//
echo "<hr>";
echo "<a href=/php/hello.html>Hello PHP</a> , <a href=/php/config.html>Config PHP</a> , <a href=/php/install.html>Install PHP</a>";
echo "<hr>";


//*** Include Content ***//

if($_SERVER['REQUEST_URI'] == "/php/hello.html")
{
require("php/hello.php");
}
elseif($_SERVER['REQUEST_URI'] == "/php/config.html")
{
require("php/config.php");
}
elseif($_SERVER['REQUEST_URI'] == "/php/install.html")
{
require("php/install.php");
}
else
{
// Default include;
}
?>