deny access to .php files to visitors

Hi guys..
First post here!!
I want use mod_rewrite module of apache to block access to .php files.
The only .php file witch the visitors can execute is hosted to http://www.blabla.com/php/index.php
Well first of all i want to make this my index file so:

DirectoryIndex php/index.php

Code (markup):

The next i want to do is to make a 404 error page

DirectoryIndex php/index.php
ErrorDocument 404 php/error.php

Code (markup):

Well now, i want visitors can access php/index.php only from http://www.blabla.com/ but not from http://www.blabla.com/php/index.php, so

Options +FollowSymLinks
RewriteEngine On

DirectoryIndex php/index.php
ErrorDocument 404 php/error.php

#see if the request is to the file is from visitor
RewriteCond %{REMOTE_ADDR} !127\.0\.0\.1
#if it's from visitor do the following rule
RewriteRule php/index\.php e404

Code (markup):

I have install xampp to my computer and when i type http://localhost/ i see php/index.php and when i type http://192.168.1.5 i see the error page.
(192.168.1.5 is my LAN ip-address )
I want http://192.168.1.5/php/index.php to redirect to http://192.168.1.5/php/error.php and http://192.168.1.5/ to http://192.168.1.5/php/index.php
How i can do this?

 

Options +FollowSymLinks
RewriteEngine On

DirectoryIndex http://192.168.1.5/php/index.php
ErrorDocument 404 php/error.php

#see if the request is to the file is from visitor
RewriteCond %{REMOTE_ADDR} !127\.0\.0\.1
#if it's from visitor do the following rule
RewriteRule php/index\.php e404

Code (markup):

and in index.php

<?php
header("Location: http://192.168.1.5/php/error.php");
?>

PHP:

Just a thought, there is probably an easier way of doing it, method is not tested

 

Maybe you didn't understand what i want to do..
192.168.1.5 want to be any ip-address (even server-ip)
When a visitor clicks www .blabla. com/ he goes to www. blabla. com/php/index.php
and when he clicks www .blabla. com/php/index.php he goes to 404 error page (SEO friendly if possible).
Thx for the reply man!!

I think one more ReWriteCond for REQUEST_URI with the neccessery flags should give me the answer

 

Sorry, might have skimmed through it a bit quick.

I don't know about the .htaccess file but in index.php you could do

<?php
if ($_SERVER['HTTP_REFERER'] != 'http://www.blabla.com/') {
header("Location: error.php");
}
?>

PHP:

Can't say it would work 100% of the time or if it works But maybe something along those lines would

or you could do a window.location with javascript but its not as reliable

 

Options +FollowSymlinks
RewriteEngine on

RewriteRule ^/?$ /php/index.php [S=1]
RewriteCond %{REQUEST_URI} =/php/index\.php
RewriteRule (.*)? /php/error.php [R=404]

bla-bla.com to bla-bla.com/php/index.php
bla-bla.com/php/index.php to bla-bla.com/php/error.php
DOES NOT WORK

 

Yea, i was just saying you could do it with php instead I'm not that good with htaccess

 

Notice: Undefined index: HTTP_REFERER
?????

 

If you are going to the site directly (not from another page) there won't be a referrer, therefore undefined