Clean URL's: Use .htaccess URL rewrite and PHP to get clean URL's.

.htaccess

#php_flag display_startup_errors on
#php_flag display_errors on
#php_flag html_errors on

# Just in case...
Options +FollowSymlinks

RewriteEngine on


# Force WWW
###########
# For SEO and general functioning of your website, it is often better
# to either remove or, in this case, force the www subdomain to your URL

# Check whether Host value is not empty 
RewriteCond %{HTTP_HOST} !^$
# Checks if Host value does not begin with www.
RewriteCond %{HTTP_HOST} !^www\. [NC]
# Check for HTTPS (%{HTTPS} is either on or off, so %{HTTPS}s is either ons or offs and in case of ons the s is matched)
RewriteCond %{HTTPS}s ^on(s)|
# Merges the information parts to a full URL
RewriteRule ^ http%1://www.%{HTTP_HOST}%{REQUEST_URI} [R=301,L]


# Rewrite
#########

# No URL rewrite for existing files
RewriteCond %{REQUEST_FILENAME} !-f
# No URL rewrite for existing directories
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php [L]

index.php

<?php

// Create clean URL's like this:
// - Script gets the path of the url
// - It tries to include a script with the same name in the directory "content" (or any other directory you specify)
//
// For example: Url:			http://www.hoverkraft.nl/werk/mt-challenge
// File that gets included		content/werk/mt-challenge.php

function removeCommonPath($first, $second, $char='/'){
	$first = explode($char, $first);
	$second = explode($char, $second);
	while (count($second)){
		if($first[0]==$second[0]){
			array_shift($first);
		} else break;
		array_shift($second);
	}
	return implode($char, $first);
}

function getPath() {
	$path = removeCommonPath($_SERVER['REQUEST_URI'], $_SERVER['SCRIPT_NAME']);
	// Remove trailing stuff we don't want
	$path = rtrim($path, "/ \t\n\r");
	return $path;
}

$permalink = getPath();

if ($permalink == '') {
	require_once('content/home.php');
} elseif (file_exists('content/'.$permalink.'.php')) {
	require_once('content/'.$permalink.'.php');
} else {
	header('HTTP/1.0 404 Not Found');  
	header('Location: http://www.hoverkraft.nl'); // 404 page goes here
}


?>