Redirect site url http to https in codeigniter
Add this in your .htaccess
RewriteRule ^.*$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
Base_url()
should be
$config['base_url'] = 'https://www.example.com/';
Try the following code and put these lines into .htaccess file (if not exists then create) at the root of project folder :
RewriteEngine OnRewriteCond %{HTTPS} !=onRewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [R,L]
And make sure that you have also using https protocol in your $config['base_url'] in config.php file like
$config['base_url'] = 'https://yourproject.local/';