SSL (HTTPS) URLs and CodeIgniter (Extending the core)

ci logo flame SSL (HTTPS) URLs and CodeIgniter (Extending the core)In one of my previous post I have shown how we can use both secure and non-secure URLs. Now I am going to show how we can do this, extending native libraries.
What we are going to do…
We will create secure version of some functions. For this we will create a helper file ‘my_url_helper.php’ and save it in ‘system/application/helpers’. We will be creating secure version of following functions:
  • site_url()
  • base_url()
  • anchor()
  • redirect()
Lets’ start…
First we will add the following config element in the config file:
$config['secure_base_url'] = 'https://example.com';
Then, open the my_url_helper.php file (system/application/helpers/my_url_helper.php) and add the following codes.
if( ! function_exists('secure_site_url') )
{
    function secure_site_url($uri = '')
    {
        $CI =& get_instance();
        return $CI->config->secure_site_url($uri);
    }
}
 
if( ! function_exists('secure_base_url') )
{
    function secure_base_url()
    {
        $CI =& get_instance();
        return $CI->config->slash_item('secure_base_url');
    }
}
 
if ( ! function_exists('secure_anchor'))
{
    function secure_anchor($uri = '', $title = '', $attributes = '')
    {
        $title = (string) $title;
 
        if ( ! is_array($uri))
        {
            $secure_site_url = ( ! preg_match('!^\w+://! i', $uri)) ? secure_site_url($uri) : $uri;
        }
        else
        {
            $secure_site_url = secure_site_url($uri);
        }
 
        if ($title == '')
        {
            $title = $secure_site_url;
        }
 
        if ($attributes != '')
        {
            $attributes = _parse_attributes($attributes);
        }
 
        return '<a href="'.$secure_site_url.'" ' . $attributes . '>'.$title.'</a>';
    }
}
 
if ( ! function_exists('secure_redirect'))
{
    function secure_redirect($uri = '', $method = 'location', $http_response_code = 302)
    {
        switch($method)
        {
            case 'refresh'    : header("Refresh:0;url=".secure_site_url($uri));
                                break;
            default           : header("Location: ".secure_site_url($uri), TRUE, $http_response_code);
                                break;
        }
        exit;
    }
}
Now, I will extend the Config library (system/libraries/Config.php). I assume that the sub class prefix is set as ‘MY_’ in config file (system/application/config/config.php). Create a file ‘MY_Config.php’ in ‘system/application/libraries’ folder and save the file with following code.
class MY_Config extends CI_Config
{
    function MY_Config()
    {
        parent::CI_Config();
    }
 
    function secure_site_url($uri = '')
    {
        if (is_array($uri))
        {
            $uri = implode('/', $uri);
        }
 
        if ($uri == '')
        {
            return $this-&gt;slash_item('secure_base_url').$this-&gt;item('index_page');
        }
        else
        {
            $suffix = ($this-&gt;item('url_suffix') == FALSE) ? '' : $this-&gt;item('url_suffix');
            return $this-&gt;slash_item('secure_base_url').$this-&gt;slash_item('index_page').preg_replace("|^/*(.+?)/*$|", "\\1", $uri).$suffix;
        }
    }
}
Now what we have…
Now we have secured versions of those function. You may now use them as their insecured version. Enjoy coding ;).
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