How to redirect http to https in codeigniter

Now I got a solution, I updated my htaccess file.--

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]

Now, It worked for me smoothly.. :)

Insert this into .htaccess

<IfModule mod_rewrite.c>
RewriteEngine On

RewriteCond %{HTTPS} off
RewriteRule .* https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteRule .* https://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]

</IfModule>

Please Check this may help

Config changes :- Go to “application/config/config.php” and enable or set hooks to true.

$config['enable_hooks'] = TRUE;

create a new file named hooks.php in “application/config/hooks.php” and add below code in hooks.php:-

$hook['post_controller_constructor'][] = array(
                                'function' => 'redirect_ssl',
                                'filename' => 'ssl.php',
                                'filepath' => 'hooks'
                                );

Now create a new directory with named “hooks” under application directory and then create new file named “ssl.php” in “application/hooks/ssl.php” and add below code to “ssl.php” :-

function redirect_ssl() {
    $CI =& get_instance();
    $class = $CI->router->fetch_class();
    $exclude =  array('client');  // add more controller name to exclude ssl.
    if(!in_array($class,$exclude)) {
      // redirecting to ssl.
      $CI->config->config['base_url'] = str_replace('http://', 'https://', $CI->config->config['base_url']);
      if ($_SERVER['SERVER_PORT'] != 443) redirect($CI->uri->uri_string());
    } 
    else {
      // redirecting with no ssl.
      $CI->config->config['base_url'] = str_replace('https://', 'http://', $CI->config->config['base_url']);
      if ($_SERVER['SERVER_PORT'] == 443) redirect($CI->uri->uri_string());
    }
}

I tried above all ones but they did not work properly in my case. I found below solution, it works in my case. I hope it will be helpful for you as well.

RewriteEngine on

RewriteCond %{HTTPS} off
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

RewriteCond $1 !^(index\.php|resources|robots\.txt|public)
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php?/$1 [QSA,L]