RewriteEngine On
RewriteCond %{HTTPS} off [OR]
RewriteCond %{HTTP_HOST} !^www\. [OR]
RewriteCond %{HTTP_HOST} ^myhost\.com$ [NC]
RewriteRule ^ https://www.myhost.com%{REQUEST_URI} [R=301,L,NE]
RewriteCond %{THE_REQUEST} ^[A-Z]+\ /index\.php(/[^\ ]*)?\ HTTP/ 
RewriteRule ^index\.php(/(.*))?$ myhost.com/$2 [R=301,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]