301 redirect HTTPS to HTTP on Apache server

Redirecting https to http site-wide using the .htaccess file would be done through:

Options +FollowSymlinks
RewriteEngine on
RewriteBase /

RewriteCond %{SERVER_PORT} ^443$ [OR]

RewriteCond %{HTTPS} =on
RewriteRule ^(.*)$ http://yousitename.com/$1 [R=301,L]

One way is as in this example:

RewriteEngine on

#this page has to be on https
RewriteCond %{SERVER_PORT} !^443$
RewriteCond %{HTTPS} !on
RewriteCond %{REQUEST_URI} ^/secure-page1.php$ [NC]
RewriteRule ^(.*)$ https://yousitename.com/$1 [L,R=301]

#this page has to be on https
RewriteCond %{SERVER_PORT} !^443$
RewriteCond %{HTTPS} !on
RewriteCond %{REQUEST_URI} ^/secure-page2.php$ [NC]
RewriteRule ^(.*)$ https://example.com/$1 [L,R=301]

#all other pages have to be on http
RewriteCond %{SERVER_PORT} ^443$  [OR]
RewriteCond %{HTTPS} on
RewriteCond %{REQUEST_URI} !^/secure-page1.php$ [NC]
RewriteCond %{REQUEST_URI} !^/secure-page2.php$ [NC]
RewriteRule ^(.*)$ http://yousitename.com/$1 [L,R=301]

So assuming you have a good reason to want some urls as https AND have them indexed, then you can add php scripting to each page and determine whether it has to be http or https.

To permit the use of php on pages suffixed as .html you need to add an Apache handler in the .htaccess file:

# parsing html as php
AddHandler application/x-httpd-php .html 
NB: The above directiove can vary greatly depending on the rexact server configuration. It can be any of the below directives (or none for that matter):
Addhandler application/x+https-php5 .html

or

AddType application/x-httpd-php5 .html

or another combination like that.  It's bewildering how many different Apache server configuraiotns the can be and how much basic directievs can differ. The trouble is if yuo use the wrong one, you get a 500 error. So it ends up being trial and error all the way.

 php script to be added at the top of every page where you need to 301 redirect from https to http, before any other line of source code would be: 

<?php
if  ( $_SERVER['HTTPS'] )
        {
                $host = $_SERVER['HTTP_HOST'];
                $request_uri = $_SERVER['REQUEST_URI'];
                $good_url = "http://" . $host . $request_uri; 
                header( "HTTP/1.1 301 Moved Permanently" );
                header( "Location: $good_url" );
                exit;
        }
?>